title: A Rare Case of Primary osteosarcoma of urinary bladder.
abstract: Extraskeletal osteosarcoma is a malignant mesenchymal soft tissue tumor without attachment to the bone, and is able to produce osteoid or cartilaginous matrix. This entity accounts for 1% of all soft tissue sarcomas. Thus far, less than 35 cases of bladder osteosarcomas have been reported in the literature. These tumors are associated with very poor prognosis. We report a case of primary osteosarcoma of the urinary bladder presenting with intermittent hematuria, dysuria, and right flank pain. Contrast-enhanced computed tomography scan of the abdomen, pelvis, and chest revealed a bladder mass and pulmonary metastases with specks of calcification.
authors: Department of Radiodiagnosis, M. S. Ramaiah Medical College and Teaching Hospital MSRIT Post, New BEL Road, Bangalore, India.
authors: Jagdeesh Kenthanahalli
authors: JK
authors: Siddappa
authors: Saurabh
authors: S
authors: Singla
authors: Aditi
authors: A
authors: Jain
authors: Ashok
authors: A
authors: Kumar
keywords: Extraskeletal osteosarcoma; mesenchymal tumors; urinary bladder primary osteosarcoma
references: Cancer. 1956 Sep-Oct;9(5):1027-43
references: 13364888
references: Cancer. 1990 Jun 15;65(12):2762-70
references: 2160317
references: Cancer. 1971 May;27(5):1121-33
references: 5281245
references: J Med Case Rep. 2010 Feb 24;4:70
references: 20181254
references: AJR Am J Roentgenol. 2009 Jun;192(6):1481-7
references: 19457808
references: J Med Case Rep. 2009 Jan 29;3:39
references: 19178738
references: AJR Am J Roentgenol. 2012 Jan;198(1):W31-7
references: 22194512