[Retroperitoneal fibrosarcoma with myxoid matrix: a case report].
A 54-year-old male visited a local physician with right dorsolumbar pain as the chief complaint. Ultrasonography revealed a tumor mass 13 cm in diameter at the lower part of the liver, and the patient was referred to our hospital. On abdominal computed tomography, uneven contrast-enhanced effects were recognized in the tumor. On magnetic rescmance imaging studies, T1-weighted images showed a hypoechoic pattern from the kidney and a weak hyperechoic pattern from the muscle. T2-weighted images showed uneven hyperecoic patterns. Uneven contrast-enhanced effects were recognized inside and on the margin of the tumor. A diagnosis of retroperitoneal tumor was made, and surgery was performed. Histopathological examination revealed a fascicular alignment of spindle cells in the area in which the myxoid matrix is seen. On the immunological special test, only vimentin was positive, which led to the diagnosis of fibrosarcoma. Fibrosarcoma originating from retroperitoneal tumor is relatively rare.
Department of Urology, Toho University School of Medicine, Ohashi Hospital.
Yasuharu
Y
Takeuchi
Yoshitomo
Y
Sawada
Daisuke
D
Yabuki
Eisuke
E
Masuda
Daisuke
D
Sato
Toshihisa
T
Iwasawa
Kanami
K
Kuroda
Masaharu
M
Tajima
Masahiro
M
Matsushima
Toshiaki
T
Oharaseki
Nobuyuki
N
Hiruta
D014408:Biomarkers, Tumor / Q000032:analysis; D017809:Fatal Outcome; D005354:Fibrosarcoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D008113:Liver Neoplasms / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D014746:Vimentin / Q000032:analysis
D014408:Biomarkers, Tumor; D014746:Vimentin