Study of Pembrolizumab (MK-3475) in Participants With Advanced Solid Tumors (MK-3475-158/KEYNOTE-158)

Inclusion Criteria: \- Histologically or cytologically-documented, advanced solid tumor of one of the following types: * Anal Squamous Cell Carcinoma * Biliary Adenocarcinoma (gallbladder or biliary tree (intrahepatic or extrahepatic cholangiocarcinoma) except Ampulla of Vater cancers) * Neuroendocrine Tumors (well- and moderately-differentiated) of the lung, appendix, small intestine, colon, rectum, or pancreas * Endometrial Carcinoma (sarcomas and mesenchymal tumors are excluded) * Cervical Squamous Cell Carcinoma * Vulvar Squamous Cell Carcinoma * Small Cell Lung Carcinoma * Mesothelioma * Thyroid Carcinoma * Salivary Gland Carcinoma (sarcomas and mesenchymal tumors are excluded) * Any advanced solid tumor, with the exception of colorectal carcinoma (CRC), which is Microsatellite Instability (MSI)-High (MSI-H) OR * Any advanced solid tumor (including Colorectal Carcinoma \[CRC\]) which is Mismatch Repair Deficient (dMMR)/MSI-H in participants from mainland China who are of Chinese descent. (CRC participants will have a histologically proven locally advanced unresectable or metastatic CRC which is dMMR/MSI-H that has received 2 prior lines of therapy) OR * Any advanced solid tumor that has failed at least one line of therapy and is TMB-H (≥10 mut/Mb, F1CDx assay), excluding dMMR/MSI-H tumors. Note: For participants to be eligible for enrollment they must have failed at least one line of standard of care systemic therapy (ie, not treatment naïve), with the exception of CR…