[A case of transitional cell XXXX with heterotopic bone formation].

@entity1 @entity79 @entity150 @entity5
A 85-year-old @entity1 consulted our clinic due to asymptomatic macrohematuria on January 6, 1987. In the cystoscopic examination, solitary and pedunculated @entity150 was revealed. This @entity5 was located on the retrotrigonal region near the right ureteral orifice. On January 20, transurethral resection of @entity150 was planned but the base of the @entity5 was stony hard, so complete resection was not performed. On February 10, transurethral resection of bladder was performed repeatedly. At that time, the cystoscopic finding showed that the @entity5 size had increased and transurethral bladder ultrasonography showed invasion into the deep muscular layer. On February 17, total cystectomy and ileal conduit was done. Histological examination revealed poorly differentiated TCC with @entity79 . This @entity1 was discharged in good condition on March 27. Heterotopic bone formation in the @entity150 is rare. Ten cases were collected from the literature. We report a case of heterotopic bone formation and discuss the mechanism of the etiology.
