Retroperitoneal malignant mesenchymoma: a case of mesenchymal mixed tumor with osteosarcoma, leiomyosarcoma, liposarcoma and fibrosarcoma.
Malignant mesenchymoma is an interesting but very rare tumor in which malignant differentiation has occurred twice or more. We report a case of retroperitoneal malignant mesenchymoma consisting of osteosarcoma, leiomyosarcoma, liposarcoma and fibrosarcoma. Abdominal CT showed a large retroperitoneal mass with two separate and distinct parts, namely an area of prominent calcification and one of clearly enhancing solid components. The mass contained histologically distinct tumorous components with no histologic admixure at the interfaces. The densely calcified nodule corresponded to osteosarcoma, and the noncalcified clearly enhancing nodules to leiomyosarcoma, liposarcoma and fibrosarcoma.
Choi
Jung Eun
JE
Department of Radiology, Holy Family Hospital, The Catholic University of Korea, Bucheon, Korea.
Chung
Hong Jun
HJ
Yoo
Won Jong
WJ
Chung
Myung Hee
MH
Sung
Mi Sook
MS
Lee
Hae Giu
HG
Park
Il Young
IY
Kim
Jeana
J
D005354:Fibrosarcoma / Q000000981:diagnostic imaging*; D006801:Humans; D007890:Leiomyosarcoma / Q000000981:diagnostic imaging*; D008080:Liposarcoma / Q000000981:diagnostic imaging*; D008297:Male; D008637:Mesenchymoma / Q000000981:diagnostic imaging*; D008875:Middle Aged; D012516:Osteosarcoma / Q000000981:diagnostic imaging*; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed