Urothelial carcinoma of the urinary bladder mixed with squamous differentiation or squamous cell carcinoma in areas with schistosomiasis is showing high risk of recurrence and poor survival

ABSTRACT

In schistosomiasis haematobium areas endemic, bladder cancer is the first cause of malignancy in men and fourth in women. The chronic schistosomiasis would lead to variant histologic patterns which manifest in squamous cell carcinoma [SCC] or squamous differentiation [SqD]. This study evaluated the clinical outcome after radical cystectomy [RC] in patients with urothe-lial carcinoma [UC] mixed with SCC or SqD, Comparison was done with two arms of pure UC and pure SCC, indication for RC was muscle-invasive-disease, and evaluation included recurrence, metastases, and overall survival. The data of patients treated with RC for muscle-invasive-disease, selection was revised for 127 patients with urothelial carcinoma mixed with SCC/SqD, two comparative arms were 100 patients with pure UC, and 100 patients had pure SCC. Follow up was on 8 months, Syears, and 5 years to detect recurrence, metastasis, and overall survival in the three groupsThe results showed that by comparison of disease aggressiveness in the three groups regarding recurrence, metastasis, and overall survival was analysed. Overall survival with mixed tumours was significantly lower than pure UC or SCC, recurrence and metastases were higher in mixed tumour which was an independent factor for poor prognosis and low survival