Primary Signet Ring Cell Adenocarcinoma of the Bladder (Linitis Plastica of the Bladder): Report of a Case and Review of the Literature

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Abstract
Signet ring cell adenocarcinoma of the bladder is a rare tumor that usually presents as a diffuse and infiltrating neoplasm, similar to the linitis plastica type of gastric adenocarcinoma. We report the thirteenth case of primary signet ring cell adenocarcinoma of the bladder, which is documented by light microscopic, immunohistochemical and electron microscopic studies. the pertinent medical literature is reviewed and analyzed. In general, this tumor present with hematuria and irritative symptoms, and may yield equivocal radiologic and cystoscopic findings. It is characterized by a rather rapid growth rate, infiltration of the surrounding pelvic organs, and variable response to radiotherapy and radical surgery. The prognosis is apparently favorably modified by early detection of localized forms of the tumor and aggressive treatment.