title: [Metastatic malignant melanoma of the urinary bladder presenting with hematuria: a case report].
abstract: A 65-year-old man complained of macroscopic hematuria and urinary obstruction. A blood clot in the bladder eliminated transurethrally demonstrated a solitary tumor at the dome of the bladder. Transurethral resection of the bladder tumor (TUR-Bt) was performed, and histological diagnosis was malignant melanoma. Physical examination revealed a black-pigmented site on the lateral border of the right foot sole, which was dermatologically diagnosed as malignant melanoma. The vesical site was diagnosed as a metastatic melanoma of the bladder. Metastatic neoplasms of the bladder are rare, ranging from 0.1 to 6.2 percent of all bladder tumors. To our knowledge, approximately forty percent of metastatic neoplasms of the bladder originate from melanoma. Therefore, an atypical nodular lesion encountered during cystoscopy may be metastasis of malignant melanoma and dermatic lesions should be investigated.
authors.affiliation: The Department of Urology, Keiyu Hospital.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Maeda
authors.forename: Yasumitsu
authors.initials: Y
authors.lastname: Uchida
authors.forename: Tomo
authors.initials: T
authors.lastname: Kouda
authors.forename: Haruka
authors.initials: H
authors.lastname: Matsui
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Kawahara
authors.forename: Teiko
authors.initials: T
authors.lastname: Sato
authors.forename: Fumio
authors.initials: F
authors.lastname: Nakajima
mesh_terms: D000368:Aged; D005534:Foot Diseases / Q000473:pathology*; D006417:Hematuria / Q000209:etiology*; D006801:Humans; D008297:Male; D008545:Melanoma / Q000150:complications / Q000556:secondary*; D012878:Skin Neoplasms / Q000473:pathology*; D001749:Urinary Bladder Neoplasms / Q000150:complications / Q000556:secondary*