[Incidence and morphology of coexisting carcinomas of the urinary bladder and prostate].

The objective of the present study was to determine the incidence of coexisting carcinomas of the urinary bladder and prostate using biopsy material obtained by transurethral resection and to identify the histologic tumor types including grading and staging. The incidence of double carcinomas was found to be 4.2% referring to all bladder carcinomas studied (n = 1228) and 17.7%, respectively, considering only those cases for which biopsies were available from both organs (n = 294). The overwhelming majority (81%) of the bladder carcinomas represented well and moderately differentiated papillary transitional cell carcinomas (grades 1 and 2) showing a low staging. Accordingly, most of the prostatic carcinomas (78.6) were well and moderately differentiated uniform glandular and pluriform glandular-cribriform types of a low staging.