Four patients with solid genito-urinary tumors and HIV 1 infection have been treated in our institution over the last 2 years, including 2 with seminoma, 1 with renal adenocarcinoma and 1 with renal angiosarcoma. All had severely impaired immunity with a low CD4 level. Three had or developed a true AIDS syndrome according to the WHO and CDC criteria (1988). The remaining patient was seropositive and died less than 3 months following the diagnosis of renal angiosarcoma, he is the first reported case of renal sarcoma in a patient infected with HIV 1. Two patients were homosexuals and the other 2 were drug addicts. Along with other reported cases, our cases may underline the association between depression of immunity due to HIV and onset of solid genito-urinary tumors.