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Inflammatory myofibroblastic tumor of the urinary bladder after TUR-Bt Shuichi Kato 1 , Hiroshi Hotta 1 , Masahiko Obata 2 , Masafumi Miyake 1 1Department of Urology,Asahikawa Red Cross Hospital 2Department of Pathology,Asahikawa Red Cross Hospital Keyword: 膀胱腫瘍 , 炎症性偽腫瘍 pp.637-640
Published Date 2009/7/20
DOI https://doi.org/10.11477/mf.1413101789
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 A 46-year-old man with asymptomatic gross hematuria had three papillary bladder tumors cystoscopically. Pathological examination of the transurethrally resected specimen revealed urenary carcinoma,G2,pT1. Postoperative asymptomatic gross hematuria was persisted and cystoscopic examination showed a non-papillary tumor in the retrotrigone of the bladder. Pathological diagnosis of the tumor obtained by transurethral resection was an inflammatory myofibroblastic tumor consisted of spindle cells but without abnormal nuclear mitosis and positive staining for anaplastic lymphoma kinase. 5 months after TUR-Bt,there is no recurrence. Inflammatory myofibroblastic tumor of the urinary bladder is a rare benign entity that can easily be mistaken for a malignant neoplasm both clinically and histologically. It is important to identify inflammatory pseudotumor in order to avoid more invasive surgeries.


Copyright © 2009, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1332 印刷版ISSN 0385-2393 医学書院

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