A crescent-shaped sparing proximal to a liver tumor may indicate underlying portal tumor thrombus.
A primary or metastatic liver tumor sometimes blocks portal venous flow and causes a focal sparing in the fatty liver. We herein report a case of segmental sparing due to the portal tumor thrombus extending from the metastatic liver tumor. The present case demonstrates characteristic computer-associated tomographic findings, a distal oval hypodense tumor with proximal "crescent-shaped sparing", which may indicate underlying portal tumor thrombus at the apex of the sparing.
Department of Surgery, Tokyo Metropolitan Fuchu Hospital, Tokyo Metropolitan Bokuto Hospital, Tokyo, Japan. otanis@zc4.so-net.ne.jp
Taiichi
T
Otani
Hiroshi
H
Usui
Hiroko
H
Tsunoda-Shimizu
Yukari
Y
Takada
Kijuro
K
Takanishi
Tomohito
T
Minami
D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000556:secondary; D006801:Humans; D008113:Liver Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000556:secondary; D008297:Male; D008875:Middle Aged; D009360:Neoplastic Cells, Circulating; D011169:Portal Vein; D012004:Rectal Neoplasms / Q000473:pathology; D014057:Tomography, X-Ray Computed