Patient description: A 57-year-old man was admitted to the clinic because of weight loss and persistent dry cough 4 months ago. Chest computed topography showed bilateral multiple infiltrates in the upper lobes and thickened bronchial walls. There is a documented positive serum MPO-ANCA in his medical record. Transbronchial biopsy revealed necrotic granulomas with multinucleated giant cells and the Wegener's granulomatosis was diagnosed for him. He is treating with corticosteroid and cyclophosphamides since 4 months ago. His Birmingham Vasculitis Activity Score (BVAS) is above 4 since the beginning of his disease. His last physical exam and lab study was performed yesterday and showed the results bellow: A wellbeing, well-nourished man, non-icteric, cooperative and alert Weight: 73 kg Height: 177 BP: 120/80 HR: 90/min RR: 22/min Hgb: 13 g/dl WBC: 8000 /mm3 (Neutrophil: 2700/mm3) Plt: 300000 /ml AST: 40 U/L ALT: 56 U/L Alk P: 147 U/L Bill total: 1.2 mg/dl ESR: 120 mm/hr MPO-ANCA: 153 EU

Clinical trial eligibility criteria: eligible ages (years): 18.0-999.0,  Urothelial Carcinoma Histological or cytological proof of urothelial carcinoma of the urethra, bladder, ureters, or renal pelvis Advanced (clinical stage T4b, unresectable) or metastatic disease Prior radiation therapy is allowed to < 25% of the bone marrow Age > 18 years at the time of consent Written informed consent and HIPAA authorization for release of personal health information Females must not be pregnant or breastfeeding WOCBP must have a negative serum or urine pregnancy test (minimum sensitivity 25 IU/L or equivalent units of HCG) within 72 hours before the start of ipilimumab Men of fathering potential must be using an adequate method of contraception to avoid conception throughout the study [and for up to 26 weeks after the last dose of investigational product] in such a manner that the risk of pregnancy is minimized Prior Autoimmune disease: Patients with a history of inflammatory bowel disease, including ulcerative colitis and Crohn's Disease, are excluded from this study, as are patients with a history of symptomatic disease (eg, rheumatoid arthritis, systemic progressive sclerosis [scleroderma], systemic lupus erythematosus, autoimmune vasculitis [eg, Wegener's Granulomatosis]); motor neuropathy considered of autoimmune origin (e.g. Guillain-Barre Syndrome and Myasthenia Gravis). Patients with other immune disorders should not be enrolled without discussion with the principal investigator  No active CNS metastases. Subjects with neurological symptoms must undergo a head CT scan or brain MRI to brain metastasis No prior malignancy is allowed except for cancers that have been definitively treated with a risk of recurrence of < 30% based on the treating oncologists assessment Patients may not have received prior systemic chemotherapy for metastatic/advanced urothelial carcinoma. Prior neoadjuvant/adjuvant therapy is permitted if completed ≥ 12 months prior to registration for protocol therapy. Prior intravesical therapy is permitted No treatment with any investigational agent within 30 days prior to registration for protocol therapy No underlying medical or psychiatric condition, which in the opinion of the investigator will make the administration of ipilimumab hazardous or obscure the interpretation of AEs, such as a condition associated with frequent diarrhea No non-oncology vaccine therapy used for prevention of infectious diseases (for up to 1 month before or after any dose of ipilimumab) No history of prior treatment with ipilimumab or prior CD137 agonist or CTLA 4 inhibitor or agonist No known active or chronic infection with HIV, Hepatitis B, or Hepatitis C No clinically significant infections as judged by the treating investigator No chronic systemic corticosteroids (defined as the equivalent of prednisone ≥ 20 mg PO daily for > 6 months during the past year)