title: Two Cases of Solitary Fibrous Tumor Involving Urinary Bladder and a Review of the Literature.
abstract: Solitary fibrous tumor (SFT) is a rare neoplasia of mesenchymal origin, initially described in visceral pleura and lately discovered to have ubiquitous distribution. SFT of the urogenital tract is uncommon and appears to have similar morphologic features and biologic behaviors as SFTs found elsewhere. We present two new cases of SFT of the bladder and review 22 similar cases published in the literature. Due to the general indolent behavior of these lesions, a complete but organ sparing surgical excision should be considered when technically feasible. Therefore, proper identification and characterization of SFT through morphological and immunohistochemical criteria on biopsy specimens are mandatory in the differential diagnosis from other more aggressive spindle-cell tumors, thus avoiding unnecessary radical surgery.
authors: Federal University of São Paulo, São Paulo, SP, Brazil; Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors: Eduardo Yukio
authors: 0000-0003-1191-2411
authors: EY
authors: Tanaka
authors: Federal University of São Paulo, São Paulo, SP, Brazil; Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors: Vitor Bonadia
authors: VB
authors: Buonfiglio
authors: Federal University of São Paulo, São Paulo, SP, Brazil; Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors: Joao Padua
authors: JP
authors: Manzano
authors: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors: Renée Zon
authors: RZ
authors: Filippi
authors: Federal University of São Paulo, São Paulo, SP, Brazil; Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors: Marcus Vinicius
authors: MV
authors: Sadi