Immuno-positron Emission Tomography Study of 89Zr-S095012 in Patients With Advanced Solid Tumours

Inclusion Criteria: * Histologically confirmed diagnosis of unresectable, locally advanced or metastatic solid tumour, for which standard treatment options are not available, no longer effective, or not tolerated * At least one measurable target lesion as per RECIST 1.1 * Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 * Royal Marsden Prognosis score of 0 to 1 (score based on lactate dehydrogenase (LDH) value, albumin value and number of sites of metastasis) * Adequate organ function as assessed by laboratory tests (especially adequate hepatic function) * Negative test results for cytomegalovirus (CMV), Epstein-Barr virus (EBV), Hepatitis B virus (HBV), and Hepatitis C virus (HCV) infection, according to local standards. Exclusion Criteria: * Participants with no available archived material and no tumour lesions amenable to biopsy * Participants with primary central nervous system malignancies, with Child-Pugh Class B8 or higher, or C liver cirrhosis * Participants with active auto-immune disease or immune-related adverse event currently requiring systemic anti-inflammatory agent (more than 10mg/day prednisone or equivalent) * Participants with a history of an opportunistic infection within a year before the administration of first study drug dose are excluded. * Participants who received either systemic corticosteroids (\> 10 mg per day of prednisone or equivalent) or other immunosuppressive medication during the 2 months prior to the first dose of the study drug are excluded. * Participants with prior history of Grade ≥ 3 immune-related pneumonitis, colitis, hepatitis, or myocarditis * Participants with a history of progressive multifocal leukoencephalopathy * Participants must not have a history of active tuberculosis requiring treatment within 3 years prior to the start of treatment or a suspicion of latent tuberculosis by the investigator.