Conditions: Appendix Adenocarcinoma; Human Papillomavirus-Related Anal Squamous Cell Carcinoma; Human Papillomavirus-Related Cervical Squamous Cell Carcinoma; Human Papillomavirus-Related Squamous Cell Carcinoma of the Penis; Human Papillomavirus-Related Vulvar Squamous Cell Carcinoma; Neuroendocrine Carcinoma; Pancreatic Neuroendocrine Tumor; Recurrent Merkel Cell Carcinoma; Recurrent Nasopharynx Carcinoma; Recurrent Peritoneal Malignant Mesothelioma; Recurrent Pleural Malignant Mesothelioma; Stage III Merkel Cell Carcinoma AJCC v7; Stage III Nasopharyngeal Carcinoma AJCC v7; Stage III Pleural Malignant Mesothelioma AJCC v7; Stage IV Merkel Cell Carcinoma AJCC v7; Stage IV Nasopharyngeal Carcinoma AJCC v7; Stage IV Pleural Malignant Mesothelioma AJCC v7; Stage IVA Nasopharyngeal Carcinoma AJCC v7; Stage IVB Nasopharyngeal Carcinoma AJCC v7; Stage IVC Nasopharyngeal Carcinoma AJCC v7; Vaginal Squamous Cell Carcinoma, Not Otherwise Specified
Interventions: Drug: Atezolizumab; Biological: Bevacizumab; Other: Laboratory Biomarker Analysis; Other: Pharmacological Study
Sponsors: M.D. Anderson Cancer Center; National Cancer Institute (NCI)
Active, not recruiting