Urinary bladder pyogenic granuloma: a case report.
BACKGROUND
Although more than 100 cases of hemangioma of the urinary bladder have been reported, capillary-type hemangiomas of the bladder are rare. Pyogenic granulomas, which are common tumor-like vascular lesions of the skin and oral mucous membranes, reveal histopathological findings similar to capillary-type hemangiomas and are differentiated from ordinary hemangiomas by clinical features and etiologic factors. Little is known regarding the occurrence of pyogenic granulomas in the urinary bladder.


METHODS
We present the case of a 78-year-old Japanese man who had developed a hemangiomatous lesion in his bladder which led to acute clot retention. He had a recent history of chemotherapy for pancreatic cancer. A solitary pedunculated mass measuring 1.2 cm was observed in the bladder. Histopathological analysis of the resected mass revealed marked lobular capillary proliferation with surface erosions.


CONCLUSIONS
Cystoscopic and pathologic findings in addition to possible predisposing factors supported a diagnosis of pyogenic granuloma of the urinary bladder.
Department of Urology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, Japan. shmuka@fc.miyazaki-u.ac.jp.
Shoichiro
S
Mukai
Hiroyuki
H
Tanaka
Kouji
K
Yamasaki
Takayuki
T
Goto
Chie
C
Onizuka
Toshiyuki
T
Kamoto
Hiroaki
H
Kataoka