Pseudolesion in segment IV of the liver on MRI: prevalence and morphology in 250 cirrhotic livers compared with 250 normal livers.
OBJECTIVE
The goal of our study was to assess the prevalence of pseudolesion in segment IV of the liver on MRI in patients with and without liver cirrhosis.


METHODS
Patients were divided into three groups: 10 patients with angiographically confirmed aberrant gastric venous drainage and liver cirrhosis (Group 1), 250 consecutively selected patients with liver cirrhosis (Group 2), and 250 with normal liver (Group 3). The signal intensity of pseudolesion in segment IV on T1- and T2-weighted MRI in the 510 patients was analyzed.


RESULTS
In Group 1, five pseudolesions were visible and hyperintense on T1-weighted images. On T2-weighted images, four were visible and hypointense. In Group 2, 11 were seen (4.4%). All were hyperintense on T1-weighted images. Five were hypointense on T2-weighted images. In Group 3, one pseudolesion was seen (0.4%).


CONCLUSIONS
The prevalence of pseudolesion in segment IV on MRI is higher in liver cirrhosis than in normal liver. The lesion is hyperintense on T1-weighted images when visible.
Department of Radiology, Kanazawa University School of Medicine, Japan.
K
K
Ueda
O
O
Matsui
M
M
Kadoya
J
J
Yoshikawa
T
T
Gabata
S
S
Takahashi
Y
Y
Kawamori
T
T
Takashima
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008099:Liver / Q000033:anatomy & histology / Q000098:blood supply / Q000473:pathology*; D008103:Liver Cirrhosis / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged