Inclusion Criteria:

1. Male or female patients, age ≥18 years 2. Patients with a histological/cytological or radiological diagnosis of HCC (mixed HCC cholangiocarcinoma may be included; patients who are candidates for surgical and non-surgical treatment, as well as those being followed without specific HCC therapy may be included)

Exclusion Criteria:

1. Inability to provide written informed consent

Inclusion Criteria:

• Diagnosis of primary pathologic stage 0-III cutaneous malignant melanoma
• Three months to five years post-surgery
• No current evidence of cancer
• Not adherent to thorough SSE (i.e., did not check entire body at least once during the past three months)
• ≥ 18 years old
• Internet access
• Able to speak/read English
• Able to provide informed consent

Exclusion Criteria:

• Children

Inclusion Criteria:

1. Subjects will be between the ages of 15 and 75, inclusive. 2. Subjects must have a histologically confirmed diagnosis of a solid tumor metastatic to bone, or a histologically confirmed diagnosis of a solid tumor to the bone or metastatic to the bone. 3. Subjects must have measurable disease on anatomic imaging that is also avid for phosphonate compounds as demonstrated by a positive 99mTc diphosphonate bone scan. Not all lesions must be positive on bone scan. 4. Adequate organ function, including: i. Adequate renal function, defined as a measured creatinine clearance >70 mL/min/1.73 m2 or normal radioisotope glomerular filtration rate (GFR). ii. Adequate hematologic function, defined as a platelet count >100,000 cells/mm3 and an absolute neutrophil count (ANC) >1,000 cells/mm3. 5. Life expectancy of at least eight weeks. 6. Karnofsky performance status >50%. 7. Subjects must have adequately recovered from the effects of any prior chemotherapy, as determined by the treating physician and study team, based in part on organ function defined above. Toxicities from previous therapies must have recovered to CTCAE v5.0 grade ≤1. Subjects with Grade 2 anemia per CTCAE v5.0 will be permitted as long as the subject has normal cardiac function. 8. Adequate cardiac function. Subjects with previously identified cardiac disease will be eligible, as 153Sm-DOTMP is not expected to cause cardiac dysfunction and is only expected to result in very transient hypocalcemia. 9. A stem cell product collected either by peripheral stem cell mobilization or bone marrow harvest prior to the infusion of CycloSam® must be available, prior to trial entry. A minimum of 2 x 106 CD34+ cells/kg ideal body weight are required. 10. Female subjects of child-bearing potential (defined as premenopausal and capable of becoming pregnant) must have a negative serum pregnancy test at the Screening visit. Females must be surgically sterile, postmenopausal for at least one year prior to Screening (no other medical cause involved) with a Follicle Stimulating Hormone (FSH) level of greater than 40 mIU/mL or must be using a highly effective method of birth control and agree to its use for at least 30 days following the last dose of 153Sm-DOTMP. Highly effective methods of contraceptive are defined as tubal ligation or an approved hormonal contraceptive such as oral contraceptives, patches, implants, injections, rings, or hormonally-impregnated intrauterine device. 11. Male subjects with partners of child-bearing potential must agree to use highly effective methods of contraception for at least 90 days after the last dose of 153Sm-DOTMP. 12. The subject and/or the subject's legally authorized guardian, if the subject is a minor, must acknowledge in writing that informed consent to become a study subject has been obtained, in accordance with institutional policies approved by the U.S. Department of Health and Human Services. 13. Subjects must have previously received effective treatment for their underlying disease and have no potentially curative options available. 14. The concurrent use of hormonal therapies or bisphosphonates is acceptable, provided the latter do not render target lesions invisible on 99mTc bone scan. Subjects will have the option to re-screen up to once more after seven days if they do not initially meet all of the inclusion criteria

Exclusion Criteria:

1. Subject is pregnant or breastfeeding. 2. Subject is sexually active and does not agree to use accepted, effective forms of contraceptive. 3. Subject has received prior radiotherapy to all known areas of current active disease. 4. Subject has a body mass index (BMI) > 50 kg/m2.

Inclusion Criteria:

• Cytologically or histologically and radiologically confirmed solid tumor that is inoperable, locally advanced, metastatic, or recurrent.
• Dose-Escalation Stage Cohorts A, AB and AN and Cohort-Expansion Stage (Cohorts B - M, BN, DB, FN and HN): The subject has received standard life-prolonging therapies unless they do not exist, or available therapies are intolerable or no longer effective.
• Cohort-Expansion Stage Cohort B and BN (Non-small Cell Lung Cancer): Subjects with Stage IV NSCLC who have documented radiographic disease progression during or following their last systemic anticancer therapy.
• Cohort-Expansion Stage Cohorts D and DB (Epithelial Ovarian Cancer): Subjects with high-grade serous ovarian cancer, including primary peritoneal cancer (PPC) and fallopian tube cancer (FTC) who have platinum-resistant disease following treatment with platinum-containing chemotherapy.
• Cohort-Expansion Stage Cohort E (Cervical Cancer): Subjects with persistent, recurrent, or metastatic carcinoma of the uterine cervix who have documented radiographic disease progression during or following their last systemic anticancer therapy.
• Cohorts F and FN (SCCHN): Subjects with head and neck cancer (squamous cell histology) who have documented radiographic disease progression during or following their last systemic anticancer therapy. Allowed primary tumor locations are oral cavity, oropharynx, hypopharynx, glottic larynx. Note: Excluded are subjects with primary tumor site of the nasopharynx.
• Cohort G (Pancreatic Cancer): Subjects with pancreatic cancer (adenocarcinoma histology) who have documented radiographic disease progression during or following their last systemic anticancer therapy.
• Cohorts H and HN (Esophageal SCC): Subjects with esophageal cancer (squamous cell histology) who have documented radiographic disease progression during or following their last systemic anticancer therapy. Note: subjects with esophageal adenocarcinoma and adenocarcinoma of gastroesophageal junction (GEJ) are excluded.
• Cohort I (mCRPC): Subjects with metastatic, castration resistant adenocarcinoma of the prostate. Note: Neuroendocrine differentiation and other histological features are permitted if adenocarcinoma is the primary histology.
• Cohort J (TNBC): Subjects with triple-negative (estrogen receptor negative [ER-]/progesterone receptor negative [PR-]/ human epidermal growth factor receptor 2 negative [HER-2-]) breast cancer who have documented radiographic disease progression during or following their last systemic anticancer therapy for inoperable locally advanced or metastatic disease.
• Cohort K (HR + BC): Subjects with breast cancer that is hormone receptor-positive (ER+ and/or PR+) and HER-2-) and who have documented radiographic disease progression during or following their last systemic anticancer therapy for inoperable locally advanced or metastatic disease.
• Cohort L (Endometrial Cancer): Subjects with advanced, recurrent or metastatic endometrial cancer who have documented radiographic disease progression during or following their last systemic anticancer therapy.
• Cohort M (Tumor-Agnostic Tissue Factor-Expressing Solid Tumors): Subjects with solid tumors other than those designated in Cohorts B-L and those which express tissue factor. Participation in this cohort will be at selected sites and countries based on site feasibility assessment.
• Expansion Cohorts: Subjects must have measurable disease per RECIST 1.1 as determined by the Investigator.
• Tumor tissue material collected approximately 2 years prior to consent. If archival tumor tissue is not available, a fresh tumor biopsy may be collected from subjects enrolled in the Dose-Escalation Stage and must be collected from subjects in the Cohort-Expansion Stage, at least 7 days (and up to 60 days) prior to first dose.
• Recovery to baseline or ≤ Grade 1 severity (Common Terminology Criteria for Adverse Events version 5 [CTCAE v5]) from AEs.
• Eastern Cooperative Oncology Group (ECOG) Performance Status of 0-1.
• Adequate organ and marrow function.
• Sexually active fertile subjects and their partners must agree to use medically accepted methods of contraception.
• Female subjects of childbearing potential must not be pregnant at screening.

Exclusion Criteria:

• Receipt of prior therapies as defined in study protocol
• Known brain metastases or cranial epidural disease unless adequately treated with radiotherapy and/or surgery (including radiosurgery) and stable for at least 4 weeks before first dose of study treatment.
• Uncontrolled, significant intercurrent or recent illness.
• Major surgery within 4 weeks before first dose of study treatment
• Corrected QT interval calculated by the Fridericia formula (QTcF) > 480 ms per electrocardiogram (ECG).
• Pregnant or lactating females
• Previously identified allergy or hypersensitivity to components of study treatment formulations or history of severe infusion-related reactions to monoclonal antibodies.
• Diagnosis of another malignancy within 2 years before first dose of study treatment, except for superficial non-melanoma cancers, or localized, low grade tumors deemed cured and not treated with systemic therapy.

Inclusion Criteria:

• Cytologically or histologically confirmed solid tumor that is inoperable locally advanced, metastatic, or recurrent.
• Dose-escalation (single-agent and combination therapy): Subjects with a solid tumor that is unresectable or metastatic and for which life-prolonging therapies do not exist or available therapies are intolerable or no longer effective.
• Expansion Cohort A (ccRCC): Subjects with previously treated advanced RCC with clear cell histology (including those with a sarcomatoid component) who have radiographically progressed following treatment with at least one prior systemic anticancer regimen for inoperable locally advanced or metastatic disease.
• Expansion Cohorts B and E (nccRCC): Subjects with previously treated advanced RCC with non-clear cell histology who have radiographically progressed following treatment with at least one prior systemic anticancer regimen for inoperable locally advanced or metastatic disease.
• Expansion Cohorts C and F (HR+ BC): Subjects with breast cancer that is hormone receptor positive (ER+ and/or PR+) and negative for human epidermal growth factor receptor 2 (HER-2) and who have radiographically progressed during or following treatment with at least one prior systemic anticancer regimen for inoperable locally advanced or metastatic disease.
• Expansion Cohorts D and G (mCRPC): Subjects with metastatic CRPC (adenocarcinoma of the prostate). Neuroendocrine differentiation and other features permitted if adenocarcinoma is the primary histology.
• Expansion Cohort H (CRC): Subjects with histologically confirmed unresectable, locally advanced, or metastatic adenocarcinoma of the colon or rectum, KRAS/NRAS wild-type (confirmed via local testing report) and determined NOT to have microsatellite instability high (MSI-high) or mismatch repair deficient (dMMR) by local testing, who received the following standard of care chemotherapy regimens as prior therapy for metastatic CRC:
• Fluoropyrimidine, irinotecan and oxaliplatin, with or without an anti-VEGF monoclonal antibody (bevacizumab)
• Anti-EGFR monoclonal antibody (cetuximab or panitumumab)
• BRAF inhibitor (in combination with cetuximab +/- binimetinib) for subjects with BRAF V600E mutations
• Expansion Cohorts: Subjects must have measurable disease per RECIST 1.1.
• Tumor tissue material:
• Subjects in the non-biomarker cohort provide archival, if available, or fresh tumor tissue if it can be safely obtained.
• Recovery to baseline or ≤ Grade 1 severity (CTCAE v5) from adverse events (AEs), including immune-related adverse events (irAEs), related to any prior treatments, unless AE(s) are clinically nonsignificant and/or stable on supportive therapy.
• Eastern Cooperative Oncology Group (ECOG) Performance Status of 0-1.
• Adequate organ and marrow function.
• Sexually active fertile subjects and their partners must agree to use highly effective methods of contraception.
• Female subjects of childbearing potential must not be pregnant at screening.

Exclusion Criteria:

• Prior treatment with XL092 (all cohorts), prior treatment with PD-L1/PD-1 targeting immune checkpoint inhibitor (Cohorts E, F, G, and H only), or prior treatment with regorafenib and/or TAS-102 (Cohort H only).
• Receipt of any type of small molecule kinase inhibitor within 2 weeks before first dose of study treatment.
• Receipt of any type of anticancer antibody, systemic chemotherapy, or hormonal anticancer therapy within 4 weeks before first dose of study treatment.
• Radiation therapy for bone metastasis within 2 weeks, any other radiation therapy within 4 weeks before first dose of study treatment. Subjects with clinically relevant ongoing complications from prior radiation therapy are not eligible.
• Known brain metastases or cranial epidural disease unless adequately treated with radiotherapy and/or surgery (including radiosurgery) and stable for at least 4 weeks before first dose of study treatment.
• Uncontrolled, significant intercurrent or recent illness.
• Concomitant use of certain medications.
• Corrected QT interval calculated by the Fridericia formula (QTcF) > 450 ms for males and > 470 ms for females. Single ECGs are no longer permitted.
• Pregnant or lactating females.
• Diagnosis of another malignancy within 2 years before first dose of study treatment, except for superficial skin cancers, or localized, low grade tumors deemed cured and not treated with systemic therapy.

Additional Exclusion Criteria for XL092 + Atezolizumab Combination Therapy Cohorts ONLY:

• Diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 2 weeks prior to first dose of study treatment.
• Administration of a live, attenuated vaccine within 30 days before first dose of study treatment.

Additional Exclusion Criteria for XL092 + Avelumab Combination Therapy Cohorts ONLY:

• Active autoimmune disease that might deteriorate when receiving an immunostimulatory agent.
• Administration of a live, attenuated vaccine within 30 days before first dose of study treatment.

Inclusion Criteria:

• HER2-positive status will be based on pretreatment biopsy material and defined as an immunohistochemistry (IHC) score of 3+ and/or positive by in situ hybridization (ISH) according to current American Society of Clinical Oncology (ASCO) College of American Pathologists (CAP) guidelines. Central testing is not required * Known hormone receptor (HR) status as defined by ASCO/CAP guidelines (based on pretreatment biopsy material). Hormone receptor positive status can be determined by either known positive estrogen receptor (ER) or known positive progesterone receptor (PR) status; hormone receptor negative status must be determined by both known negative ER and known negative PR
• Patients with clinical stage T1-4, N0-3 disease at presentation and residual invasive disease postoperatively as defined above are eligible. (Note: Patients with T1a/bN0 tumors are not eligible at initial breast cancer diagnosis are not eligible)
• Patients with residual HR-negative, HER2 positive (+) disease in the breast and/or lymph nodes per the surgical pathology report are eligible; however, patients with HR+ HER2+ cancers must have node-positive residual disease per the surgical pathology report in order to qualify for the study. The presence of residual invasive disease in the breast is not mandatory for these patients
• Patients with weakly ER-positive (1-10%) breast cancer (based on the pretreatment core biopsy) are eligible even if they have node-negative disease per the surgical pathology report
• The residual disease tissue (breast and/or lymph nodes) is not required to be HER2-positive, as eligibility for NCI-2020-03770 (A011801) is based on a positive HER2 status at the time of the initial breast cancer diagnosis * Note: The presence of micrometastases in lymph nodes after preoperative therapy counts as residual disease, whereas the presence of isolated tumor cells does not
• Patients with synchronous bilateral invasive disease are eligible provided both lesions were confirmed to be HER2-positive, and at least one of the lesions meets the criteria outlined above. Multifocal disease is allowed, as long as the largest biopsied breast tumor was HER2-positive
• Patients must have received neoadjuvant chemotherapy with one of the following regimens: docetaxel/trastuzumab/pertuzumab (THP), paclitaxel/methotrexate/cisplatin (TMP), doxorubicin/cyclophosphamide/paclitaxel/trastuzumab/pertuzumab (AC-TH(P)); docetaxel/carboplatin/trastuzumab/pertuzumab (TCH(P)); fluorouracil/doxorubicin/cyclophosphamide-docetaxel/trastuzumab/pertuzumab (FAC-TH(P)), or fluorouracil/epirubicin/cyclophosphamide-docetaxel/trastuzumab/pertuzumab (FEC-TH(P)). Note: apart from TCHP, where T is docetaxel, treatment with docetaxel or paclitaxel is acceptable
• Prior receipt of T-DM1 in the neoadjuvant setting is not allowed.
• Prior treatment must have consisted of >= 6 cycles of chemotherapy and HER2-directed therapy, with a total duration of >= 12 weeks, including at least 9 weeks of preoperative taxane and trastuzumab with or without pertuzumab (or Food and Drug Administration [FDA]-approved biosimilars). Patients who have received at least 9 weeks of preoperative taxane, pertuzumab and margetuximab are also eligible if they received >= 6 cycles of systemic therapy prior to enrollment. Note: Patients who complete at least nine of a planned twelve doses of weekly paclitaxel, or three of a planned four doses of docetaxel, but discontinue prematurely due to toxicity are eligible. Patients receiving dose-dense chemotherapy regimens are also eligible. Prior use of nab-paclitaxel (Abraxane) instead of paclitaxel or docetaxel is permitted. Prior use of subcutaneous trastuzumab (Hylecta) and subcutaneous trastuzumab and pertuzumab (Phesgo) is also allowed.
• Patients who received neoadjuvant systemic therapy which included experimental HER2-targeted therapy/therapies are potentially eligible, as long as the investigational agent was not a HER2-targeted antibody-drug conjugate (e.g. T-DM1, DS-8201a [trastuzumab deruxtecan]) or a HER2 targeted tyrosine kinase inhibitor (TKI) (e.g. tucatinib, lapatinib, neratinib).
• Patients may have received =< 1 cycles of T-DM1 in the adjuvant setting. Note: These patients will be randomized to receive a further 14 cycles of T-DM1 and tucatinib/placebo as tolerated. The most recent cycle of T-DM1 should have been administered =< 5 weeks prior to registration * Note: Both of the following two criteria need to be met for the patient to be eligible for this study
• An interval of no more than 12 weeks between the completion date of the last definitive treatment (e.g. postoperative chemotherapy or radiation, or if neither given, breast surgical date) and the date of registration. Concurrent radiation therapy is permitted while receiving study treatment
• Patients must be registered on study within =< 180 days of the date of the most recent definitive breast cancer surgery (not including reconstructive surgery)
• All systemic chemotherapy should have been completed preoperatively unless participating in EA1181 (CompassHER2 pathologic complete response [pCR]) or the BIG DECRESCENDO Trial (which is very similar to CompassHER2 pCR in terms of study design, drugs, and eligibility). However, patients who received 4 cycles of neoadjuvant THP off study can receive a further 2-4 cycles of chemotherapy postoperatively to meet eligibility for A011801. Patients who participated in EA1181 or MA41 and proceeded to surgery immediately after the de-escalated trial regimen must receive postoperative chemotherapy to complete a total of >= 6 cycles of systemic treatment prior to enrollment on A011801, as outlined above (e.g. 4 cycles pre-operatively, and 2 cycles post-operatively). The postoperative chemotherapy regimen prescribed is at the discretion of the treating oncologist (i.e. 2-4 cycles AC or THP, other). Continuation of trastuzumab + pertuzumab (HP) pre- or post-operatively as maintenance therapy (while awaiting a surgical date or an official pathology report) is allowed for all study participants
• Toxicities related to prior systemic treatment should have resolved or be at baseline, apart from alopecia and peripheral neuropathy =< grade 1
• Adequate excision: surgical removal of all clinically evident disease in the breast and lymph nodes as follows:
• Breast surgery: total mastectomy with no gross residual disease at the margin of resection, or breast-conserving surgery with histologically negative margins of excision
• For patients who undergo breast-conserving surgery, the margins of the resected specimen must be histologically free of invasive tumor and ductal carcinoma in situ (DCIS) as determined by the local pathologist. If pathologic examination demonstrates tumor at the line of resection, additional operative procedures may be performed to obtain clear margins. If tumor is still present at the resected margin after re-excision(s), the patient must undergo total mastectomy to be eligible. Patients with margins positive for classic lobular carcinoma in situ (LCIS) are eligible without additional resection
• Lymph node surgery ** The axilla needs to be evaluated with either sentinel node biopsy or axillary lymph node dissection. If patients have a sentinel lymph node biopsy and sentinel nodes are negative, no further axillary treatment is necessary. If patients have isolated tumor cells (ITCs) in the setting of residual breast disease, at least one of the following is required: axillary lymph node dissection (ALND) or planned nodal irradiation. If patients have micro- or macro-metastatic nodal disease, ALND and planned nodal irradiation are required. Of note, co-enrollment on Alliance A011202 is not allowed
• Eastern Cooperative Oncology Group (ECOG) performance status 0-1
• Absolute neutrophil count (ANC) >= 1,000/mm^3
• Hemoglobin >= 8 g/dL (Note: packed red blood cells [PRBC] transfusion is not permitted to achieve eligibility)
• Platelet count >= 100,000/mm^3
• Creatinine =< 1.5 x upper limit of normal (ULN)
• Total bilirubin =< 1.0 x upper limit of normal (ULN) or direct bilirubin within the institutional normal range for patients with Gilbert's syndrome
• Aspartate aminotransferase (AST)/alanine aminotransferase (ALT) =< 2.5 x upper limit of normal (ULN)
• Screening left ventricular ejection fraction (LVEF) >= 50% on echocardiogram (ECHO) or multiple-gated acquisition (MUGA) after receiving neoadjuvant chemotherapy and no decrease in LVEF by more than 15% absolute percentage points from the pre-chemotherapy LVEF. Or, if pre-chemotherapy LVEF was not assessed, the screening LVEF must be >= 55% after completion of neoadjuvant chemotherapy. Note: LVEF assessment may be repeated once up to 3 weeks following the initial screening assessment to assess eligibility

Exclusion Criteria:

• No adjuvant treatment with any anti-cancer investigational drug within 28 days prior to registration
• Not pregnant and not nursing, because this study involves an agent that has known genotoxic, mutagenic and teratogenic effects. Therefore, for women of childbearing potential only, a negative serum pregnancy test done =< 7 days prior to registration is required
• Patients with known active and/or untreated hepatitis B or hepatitis C or chronic liver disease are ineligible. Patients with a diagnosis of hepatitis B or C that has been treated and cleared and normal liver function are eligible to participate in the study if the other eligibility parameters are met
• Stage IV (metastatic) breast cancer
• History of any prior (ipsi- or contralateral) invasive breast cancer within 3 years of registration
• Patients with ER+ HER2+ residual invasive disease that is lymph node-negative per the surgical pathology report
• Evidence of recurrent disease following preoperative therapy and surgery
• Patients for whom radiotherapy would be recommended for breast cancer treatment but for whom it is contraindicated because of medical reasons (e.g., connective tissue disorder or prior ipsilateral breast radiation)
• History of exposure to the following cumulative doses of anthracyclines: doxorubicin > 240 mg/m^2; epirubicin or liposomal doxorubicin-hydrochloride (Myocet) > 480 mg/m^2. For other anthracyclines, exposure equivalent to doxorubicin > 240 mg/m^2
• Cardiopulmonary dysfunction as defined by any of the following:
• History of National Cancer Institute (NCI) CTCAE version (v) 5.0 grade >= 3 symptomatic congestive heart failure (CHF) or New York Heart Association (NYHA) criteria class >= II
• Angina pectoris requiring anti-anginal medication, serious cardiac arrhythmia not controlled by adequate medication, severe conduction abnormality, or clinically significant valvular disease
• High-risk uncontrolled arrhythmias: i.e., atrial tachycardia with a heart rate > 100/min at rest, significant ventricular arrhythmia (ventricular tachycardia) or higher-grade atrioventricular block (AV)-block (second degree AV-block type 2 [Mobitz 2] or third degree AV-block)
• Significant symptoms (grade >= 2) relating to left ventricular dysfunction, cardiac arrhythmia, or cardiac ischemia while or since receiving preoperative therapy
• History of a decrease in left ventricular ejection fraction (LVEF) to < 40% with prior trastuzumab treatment (e.g., during preoperative therapy)
• Uncontrolled hypertension (systolic blood pressure > 180 mmHg and/or diastolic blood pressure > 100 mmHg)
• Current severe, uncontrolled systemic disease
• Major surgical procedure unrelated to breast cancer or significant traumatic injury within 28 days prior to registration or anticipation of the need for major surgery during the course of study treatment
• History of intolerance, including grade 3 to 4 infusion reaction or hypersensitivity to trastuzumab or murine proteins or any components of the product
• Peripheral neuropathy of any etiology that exceeds grade 1
• Assessment by the investigator as being unable or unwilling to comply with the requirements of the protocol
• Use of a strong CYP3A4 or CYP2C8 inhibitor within 2 weeks, or use of a strong CYP3A4 or CYP2C8 inducer within 5 days prior to registration is prohibited.
• Please note that use of sensitive CYP3A substrates should be avoided two weeks before registration and during study treatment. Additionally, CYP3A4 or CYP2C8 inducers are prohibited as concomitant medications within 5 days following discontinuation of tucatinib treatment. Patients who require medications that are known to be sensitive substrates of CYP3A4 with a narrow therapeutic window should be excluded.

Inclusion Criteria:

Patient has ECOG performance status of 0-1 One or more documented primary oncogenic PIK3CA mutation(s) in blood and/or tumor per local assessment RLY-5836 single agent arm key inclusion criteria
• Disease that is refractory to standard therapy, intolerant to standard therapy, or participant has declined standard therapy.
• A histologically or cytologically confirmed diagnosis of unresectable or metastatic solid tumor Combination arms key inclusion criteria
• Males, postmenopausal females, or pre-/perimenopausal females previously treated with gonadotropin-releasing GnRH agonist at least 4 weeks prior to start of study drug with histologically or cytologically confirmed diagnosis of HR+, HER2- unresectable or metastatic breast cancer that is not amenable to curative therapy.
• Had previous treatment for advanced or metastatic breast cancer with antiestrogen therapy including, but not limited to, selective estrogen receptor degraders (e.g., fulvestrant), selective estrogen receptor modulators (e.g., tamoxifen), and aromatase inhibitors (AI) (letrozole, anastrozole, exemestane)
• Part 1: Prior PI3Kα inhibitor treatment is allowed if taken for < 14 days and not discontinued due to disease progression, hypersensitivity, or ≥ Grade 3 TEAEs.

Exclusion Criteria:

• Part 2: Prior treatment with PI3Kα inhibitors.
• Type 1 or Type 2 diabetes requiring antihyperglycemic medication, or fasting plasma glucose ≥140 mg/dL and glycosylated hemoglobin (HbA1c) ≥7.0%.

Inclusion Criteria:

1. Disease Criteria
• Phase 1, Part 1a: Any histologically or cytologically confirmed solid tumor malignancy that is locally advanced or metastatic and has failed standard therapy, or standard therapy is not curative or available
• Phase 1, Part 1b: Histologically or cytologically confirmed solid tumor malignancy with one of the following tumor histologies: RCC of clear cell histology only, melanoma, squamous cell skin carcinoma, ovarian cancer, non-small cell lung cancer. Those patients who previously received immunotherapy must have derived benefit from this treatment. Additionally, patients with any of the above histologies in an advanced setting who plan to undergo debulking surgery or oligometastasectomy may be eligible to receive 2 cycles of XTX202 treatment in a "window of opportunity" subcohort".
• Phase 2, Part 2a: Patients with metastatic RCC who have previously been treated with an anti-PD-1 and a TKI, per local and institutional SOC. Patients must have progressed on treatment with an anti-PD-1 mAb administered either as monotherapy or in combination with other therapies
• Phase 2, Part 2b: Patients with unresectable or metastatic melanoma who have previously been treated with at least 1 prior line of therapy in the recurrent or metastatic setting. Prior therapy must have included an anti-PD-1 alone or in combination per local and institutional standard of care, and patient must have progressed on checkpoint inhibitor therapy. Patients with BRAF V600-activating mutation must have previously received targeted therapy per local and institutional standard of care. 2. ECOG performance status of 0 or 1 3. Adequate organ function 4. Part 1b only patients must be willing to provide fresh tumor biopsies before and after initiation of study treatment.

Exclusion Criteria:

1. Received prior treatment with IL-2 therapy 2. History of clinically significant pulmonary disease 3. History of clinically significant cardiovascular disease 4. Has a diagnosis of immunodeficiency 5. Has an active autoimmune disease that has required systemic treatment in past 2 years, including the use of disease modifying agents, corticosteroids or immunosuppressive drugs 6. Has an active infection requiring systemic therapy within 4 weeks prior to study treatment

Inclusion Criteria:

• Participants who have received at least one dose of cilta-cel in a Company-sponsored clinical study
• Participants who have provided informed consent for this study

Inclusion Criteria:

1. Male 18 years or older able to understand and provide signed written informed consent. 2. Histologically or pathologically confirmed prostate adenocarcinoma without predominant small cell component. 3. Progressive disease by one or more of the following criteria: 1. Serum/plasma PSA progression defined as 2 consecutive increases in PSA over a previous reference value measured at least 1 week apart with a minimum start value of >2 ng/mL. 2. Progression of measurable disease (RECIST 1.1) or presence of at least two new bone lesions (PCWG3 criteria). 4. Previous treatment with next-generation androgen receptor (AR)-directed therapy (e.g. abiraterone, enzalutamide, apalutamide, darolutamide). 1. Must have received no more than one previous AR-directed therapy. 2. Must have been administered ARAT (abiraterone, enzalutamide, darolutamide, or apalutamide) in the castration-sensitive or castration-resistant setting. 3. Must have progressed while on ARAT. 5. PSMA-PET scan (e.g., 68Ga-PSMA-11 or 18F-DCFPyL) positive as determined by central reader. 6. Effective castration with serum testosterone level of <50 ng/dL and plan to continue with chronic medical or surgical castration. 7. Ability to attend required study visits and return for adequate follow-up, as required by this protocol. 8. Patients with HIV that are healthy and with a low risk of acquired immune deficiency syndrome related outcomes may participate in the trial at the investigators' discretion. 9. Patients with HBV and HCV may also participate if symptoms are sufficiently managed. 10. Life expectancy of at least 6 months as assessed by investigator. 11. Willing to initiate ARAT therapy determined by investigator. 12. For patients who have partners of childbearing potential: The patient and/or partner must use a method of birth control with adequate barrier protection, deemed acceptable by the principal investigator during the study and for 6 months after the last study drug administration.

Exclusion Criteria:

1. Prior treatment with radioligand therapy including other lutetium-labeled compounds. 2. Prior treatment with radium-223 (Xofigo) within the past 12 weeks. 3. Prior chemotherapy treatment for castration-resistant prostate cancer. Prior docetaxel use in the hormone-sensitive setting is permitted, as long as no more than 6 doses were received, the last dose was administered >1 year prior to consent, and disease progression did not occur during docetaxel treatment. 4. Eastern Cooperative Oncology Group (ECOG) performance status (PS) ≥ 2 5. Patients with known HRR gene-mutation who have not been previously treated with olaparib or rucaparib. 6. Other concurrent cytotoxic chemotherapy, immunotherapy, radioligand therapy, or investigational therapy. 7. Inadequate organ and bone marrow function as evidenced by: 1. Hemoglobin < 8 g/dL. 2. Absolute neutrophil count < 1.5 x 109/L. 3. Platelet count < 100 x 109/L. 4. AST/SGOT and/or ALT/SGPT > 3.0 x ULN. 5. Total bilirubin > 2 x ULN unless patient has known Gilbert's syndrome and then may be 3 x ULN. 6. Creatinine clearance (CrCl) < 50 mL/min based on the Cockcroft-Gault equation. 7. Albumin ≤ 2.75 g/dL 8. Patients who undergo a transfusion for the sole purpose of meeting eligibility for this trial will be excluded. 9. Assessment by the Investigator as unable or unwilling to comply with the requirements of the protocol. 10. Use of an investigational therapeutic drug within the last 4 weeks prior to start of study treatment or scheduled to receive one during the study period. 11. Known CNS metastasis unless received therapy, asymptomatic and neurologically stable. 12. Patients receiving zoledronic acid for bone-targeted therapy must be on stable dose for 4 weeks prior to randomization. 13. Major surgery within 30 days of randomization as determined by the Investigator. 14. Patients with active significant cardiac disease defined by any of the following: 1. New York Heart Association class 3 or 4 congestive heart failure within 6 months of signing the ICF unless treated with improvement. 2. Current diagnosis of electrocardiogram abnormalities with significant cardiac arrhythmias 3. History of long QT syndrome or know history of Torsades de Pointe 4. History of myocardial infarction, angina pectoris, or coronary artery bypass graft within 6 months of ICF signature 15. Participants with symptomatic cord compression or clinical/radiological findings indicating impending spinal cord compression 16. Patients with a superscan seen on baseline bone scan as determined by investigator. 17. Active malignancy other than low-grade non-muscle-invasive bladder cancer and non-melanoma skin cancer 18. Previous use of G-CSF for persistent neutropenia after standard of care treatment. 19. Participants who have a pregnant partner or are capable of fathering a child and who are unwilling to take precautions to prevent potential harm to the fetus or prevent pregnancy. 20. Participants with active Covid19. Recovered patients may be included when completely recovered (no symptoms at least 28 days before study medication and a negative Covid test within 72 hours).

The main inclusion and exclusion criteria include but are not limited to the following:

Inclusion Criteria:

• Has a histologically or cytologically confirmed diagnosis of RCC with clear cell component per American Joint Committee on Cancer (AJCC) (8th Edition), with or without sarcomatoid features
• Has intermediate-high risk, high risk, or M1 no evidence of disease (NED) RCC as defined by the following pathological tumor-node metastasis and tumor grading: 1. Intermediate-high risk RCC: pT2, Grade 4 or sarcomatoid, N0, M0; pT3, any grade, N0, M0 2. High risk RCC: pT4, any Grade N0, M0; pT any stage, any Grade, N+, M0 3. M1 NED RCC participants who present not only with the primary kidney tumor but also solid, isolated, soft tissue metastases that can be completely resected at one of the following: the time of nephrectomy (synchronous) or, ≤2 years from nephrectomy (metachronous)
• Has undergone complete resection of the primary tumor (partial or radical nephrectomy) and complete resection of solid, isolated, soft tissue metastatic lesion(s) in M1 NED participants
• Must have undergone a nephrectomy and/or metastasectomy ≤12 weeks prior to randomization
• Has Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 within 10 days before randomization.
• Male participants must agree to continue contraception at least 7 days after the last dose of belzutifan/placebo
• Female participants of childbearing potential must be willing to use an adequate method of contraception, for the course of the study through 120 days after the last dose of pembrolizumab or at least 30 days after last dose of belzutifan/placebo, whichever occurs last
• Has adequate organ function

Exclusion Criteria:

• Has had a major surgery, other than nephrectomy plus resection of preexisting metastases for M1 NED participants, within 4 weeks prior to randomization
• Has a pulse oximeter reading <92% at rest, requires intermittent supplemental oxygen, or requires chronic supplemental oxygen
• Has clinically significant cardiovascular disease within 6 months from first dose of study intervention
• Has other clinically significant disorders such as: serious active nonhealing wound/ulcer/bone fracture; requirement for hemodialysis or peritoneal dialysis
• Has preexisting brain or bone metastatic lesions
• Has received prior systemic therapy for RCC
• Has received prior radiotherapy for RCC
• Has received a live or live-attenuated vaccine within 30 days before the first dose of study intervention; administration of killed vaccines are allowed
• Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy
• Has a known additional malignancy (other than RCC treated with nephrectomy and/or metastasectomy) that is progressing or has required active treatment within the past 3 years
• Has an active autoimmune disease that has required systemic treatment in past 2 years (i.e., with use of disease modifying agents, corticosteroids, or immunosuppressive drugs); replacement therapy is allowed
• Has a history of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease
• Has an active infection, requiring systemic therapy
• Has a known history of human immunodeficiency virus (HIV) infection, a known history of Hepatitis B or known active Hepatitis C virus infection
• Has had an allogenic tissue/solid organ transplant