Bladder carcinoma with lymphoepithelioma-like differentiation:: A report of 9 cases

Purpose: Lymphoepithelioma-like carcinoma of the bladder is rare with only 14 cases reported to date. We report 9 additional cases with long-term followup. Materials and Methods: All 713 patients with an initial diagnosis of bladder tumor in western Sweden from 1987 through 1988 were prospectively registered and followed. A clinical and histopathological review was performed on 816 bladder tumors from the files of the oncology department treated between 1962 and 1989. Results: Of 9 patients with stages T2M0-T3M0 cancer treated with locoregional therapy 6 with either pure or predominant lymphoepithelioma-like carcinoma pattern had no evidence of disease after a median observation of 4 years (range 1 to 18) and 3 with focal lymphoepitheliomalike carcinoma pattern died of disease after 9 to 68 months. Conclusions: Lymphoepithelioma-like carcinoma is diagnosed in less advanced stages and has a more favorable long-term prognosis than other types of undifferentiated invasive carcinomas of the bladder. Our data and review of the literature suggest that lymphoepithelioma-like carcinoma should be treated stage by stage like other bladder carcinomas.