Primary carcinoid tumor of the bladder arising beneath an inverted papilloma
Stanfield, B.L.; Grimes, M.M.; Kay, S.
Archives of Pathology and Laboratory Medicine 118(6): 666-667
1994
ISSN/ISBN: 0003-9985 PMID: 8204019 Document Number: 432550
We describe a 54-year-old woman with a primary carcinoid tumor of the bladder arising beneath an inverted papilloma diagnosed by light microscopy and immunohistochemical studies. After the patient complained of hematuria and voiding difficulties, a polypoid mass was detected during cystoscopy and removed for examination. The distinctive histologic features of an inverted papilloma were readily identified. The characteristic pattern of a carcinoid tumor was confirmed with immunohistochemical studies.