This purpose of this study is to test the effectiveness of cabozantinib with nivolumab and ipilimumab in rare genitourinary cancers that have no standard treatment options. Are you Eligible? (Inclusion Criteria) Do you have confirmed diagnosis of one of the following cancers? -small cell carcinoma of the bladder; -adenocarcinoma of the bladder; -squamous cell carcinoma of the bladder; -plasmacytoid urothelial carcinoma; -any penile cancer; -sarcomatoid renal cell carcinoma; -sarcomatoid urothelial carcinoma; -renal medullary carcinoma or other miscellaneous histologic variants of the...
