Objective: To present a 15 year retrospective pathologic study of bladder cancers. The aim is to document histologic pattern, prevalence, sex and age distribution of urinary bladder cancer.
Materials And Methods: The materials consisted of slides, paraffin embedded tissue blocks and histology request forms of all urinary bladder biopsies received at the Morbid Anatomy department of Lagos University Teaching Hospital Idi-Araba, Lagos from 1991 to 2005. Each sample represents a different patient. The study did not include information regarding the clinical or pathological stage of the tumours.
Results: Bladder malignancies comprised 39 (72.2 %) cases of all bladder biopsies and 0.86% of all diagnosed cancers in LUTH. The malignant lesions of the bladder showed a male preponderance with a M:F ratio of 4.6:1. The age range was 4-75 years with a mean age of 51.37 years and peak at 61-70 years age group. Transitional cell carcinoma was the commonest histological type accounting for 61.5% with a male to female ratio of 5:1 and mean age of 59 years. Squamous cell carcinoma accounted for 20.5% with a M:F ratio of 3:1 and showed a mean age of 47 years. Adenocarcinoma, anaplastic carcinoma and embryonal rhabdomyosarcoma accounted for 5.1%, 5.1% and 7.8% of cases respectively.
Conclusion: Bladder cancer is not common in Lagos. The histopathologic pattern, prevalence, sex and age distribution of bladder cancer are similar to previous reports from schistosomiasis non endemic regions of Nigeria, Africa and the rest of the world.
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