title: Alveolar Soft Part Sarcoma of Urinary Bladder Occurring as a Second Primary Malignancy: A Case Report and Literature Review.
abstract: We report a case of bladder alveolar soft part sarcoma in an 18-year-old Thai male patient who had been treated with testicular radiation and systemic chemotherapy for acute lymphoblastic leukemia with testicular relapse. He presented with recurrent dysuria and gross hematuria. Cystoscopy revealed a 2-centimeter irregular sessile mass at the bladder base adjacent to left ureteral orifice. Transurethral resection of the tumor was performed. The histopathological diagnosis was alveolar soft part sarcoma. Chest and abdominal computed tomography showed no evidence of metastasis. He was treated with partial cystectomy and left ureteral reimplantation with negative surgical margin. No evidence of recurrence was found during a 28-month follow-up period with surveillance cystoscopy and computed tomography of the chest and abdomen.
authors.affiliation: Division of Urology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Rama IV Road, Patumwan, Bangkok 10330, Thailand.
authors.forename: Manint
authors.identifier: 0000-0003-1198-0086
authors.initials: M
authors.lastname: Usawachintachit
authors.affiliation: Division of Medical Oncology, Department of Internal Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Rama IV Road, Patumwan, Bangkok 10330, Thailand.
authors.forename: Piyada
authors.initials: P
authors.lastname: Sitthideatphaiboon
authors.affiliation: Department of Pathology, Faculty of Medicine, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand.
authors.forename: Voranuch
authors.initials: V
authors.lastname: Thanakit
authors.affiliation: Division of Hematology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, 270 Rama VI Road, Ratchatewi, Bangkok 10400, Thailand.
authors.forename: Sulada
authors.initials: S
authors.lastname: Pukiat
authors.affiliation: Division of Urology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Rama IV Road, Patumwan, Bangkok 10330, Thailand.
authors.forename: Kamol
authors.initials: K
authors.lastname: Panumatrassamee
authors.affiliation: Division of Urology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Rama IV Road, Patumwan, Bangkok 10330, Thailand.
authors.forename: Julin
authors.initials: J
authors.lastname: Opanuraks
authors.affiliation: Division of Urology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Rama IV Road, Patumwan, Bangkok 10330, Thailand.
authors.forename: Apirak
authors.initials: A
authors.lastname: Santi-Ngamkun