Extrahepatic portal vein morphology in children with extrahepatic portal hypertension assessed by 3-dimensional computed tomographic portography: a new etiology of extrahepatic portal hypertension.
OBJECTIVE
The cause of extrahepatic portal hypertension in children has not been clarified. Our aim was to determine the morphological features of the extrahepatic portal vein in children with extrahepatic portal hypertension by 3-dimensional computed tomographic portography and to clarify the etiology of this disorder.


METHODS
Six patients ranging in age from 10 to 18 years (median age, 12.8 years) who had portal hypertension presented with hematemesis. They underwent intravenous computed tomographic portography using a helical computed tomography scanner and 3-dimensional image reconstruction.


RESULTS
The extrahepatic portal vein was visualized in all patients by 3-dimensional computed tomographic portography. None of the patients showed extrahepatic portal vein obstruction or cavernous transformation. All patients had a tortuous eta-shaped extrahepatic portal vein, and a line could be drawn through the flexures of the portal vein to the hepatic hilum.


CONCLUSIONS
In children, extrahepatic portal hypertension is not caused by extrahepatic portal vein obstruction and may be of embryological origin.
Shinohara
Tsuyoshi
T
Department of Pediatric Surgery, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Aichi 466-8560, Japan. shino@med.nagoya-u.ac.jp
Ando
Hisami
H
Watanabe
Yoshio
Y
Seo
Takahiko
T
Harada
Toru
T
Kaneko
Kenitiro
K
D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D006975:Hypertension, Portal / Q000000981:diagnostic imaging* / Q000209:etiology* / Q000473:pathology; D021621:Imaging, Three-Dimensional; D008297:Male; D011169:Portal Vein / Q000000981:diagnostic imaging* / Q000473:pathology; D011172:Portography / Q000379:methods*; D014057:Tomography, X-Ray Computed