RESUMEN
OBJECTIVE: To determine possible risk factors associated with prostate invasion in patients with squamous cell carcinoma (SCC) of the urinary bladder associated with bilharziasis. METHODS: After obtaining approval from the medical ethics committee, we reviewed the clinical and pathologic data from 236 male patients in our department between January 2006 and October 2010 who were treated with radical cystoprostatectomy and proved to have SCC associated with bilharziasis. We reviewed the clinical and histopathologic data regarding prostate infiltration from SCC of the urinary bladder associated with bilharziasis. RESULTS: Two-hundred thirty-six patients were included in this study. Prostate infiltration was present in 14 patients (5.9%). Tumor located in the bladder neck (P = .000001), tumors >5 cm (P = .009), and advanced clinical tumor stage (P = .000001) were associated with highly statistically significant increased risk of prostate invasion from SCC of the urinary bladder. Different patients' ages, high tumor grade, and regional lymph nodes' metastasis were not associated with increased risk of prostate invasion from SCC of the urinary bladder. CONCLUSION: Prostate infiltration from SCC of the urinary bladder (which is associated with bilharziasis) is not uncommon. Tumor >5 cm, bladder neck tumor, and high clinical tumor stages should be considered at least relative contraindications for prostate-sparing cystectomy.