Case report 829: Intramuscular myxoid chondrosarcoma.
A 61-year-old man presented with a 6-month history of a painless mass in the right buttock. Although the MR appearance of myxoid neoplasms is variable, a myxoid neoplasm was suspected on the basis of the MR study. Percutaneous needle biopsy results yielded a diagnosis of intramuscular myxoma. Myxoid chondrosarcoma, however, was diagnosed at the time of excisional biopsy. One should be wary of a diagnosis of intramuscular myxoma based solely on the results of percutaneous needle biopsy. In addition, myxoid chondrosarcoma of the soft tissues can have a variable appearance on T1-weighted imaging.
Whitten
C G
CG
Department of Radiology, University of Iowa, College of Medicine, Iowa City.
el-Khoury
G Y
GY
Benda
J A
JA
Ehara
S
S
D002081:Buttocks; D002813:Chondrosarcoma / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000473:pathology*; D009135:Muscular Diseases / Q000175:diagnosis; D009232:Myxoma / Q000175:diagnosis; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*