Describe the embryology of extrahepatic portosystemic shunts Recognize the characteristic imaging findings of inferior mesenteric vein shunts (morphology,
classify them in different types and search potential association with other portosystemic shunts Analyze their connection with portal hypertension,
hepatic encephalopathy or hepatic diseases
PORTAL SYSTEMIC COLLATERAL VESSELS: Portosystemic collateral vessels develop in patients with portal hypertension as a way to decompress the splachnic flow,
and they can be divided into two groups depending on whether they drain toward the superior vena cava (SVC)or the inferior vena cava (IVC). - Collateral vessels draining into the SVC include the left gastric vein (coronary),
short gastric vein,
posterior gastric vein,
esophageal and paraesophageal varices. - Vessels...
Imaging findings OR Procedure details
We retrospectively reviewed 12 cases of inferior mesocaval shunts (IMS) identified in our tertiary referral hospital between 2004 and 2010,
including 6 men and 6 women aged between 41-82 years (mean age 64’7 years),
who underwent abdominal MDCT for different purposes,
the most frequent one for evaluating liver disease. This is,
to the best of our knowledge,
the largest serie reported ( Table 3 ). 10 of 12 patients had chronic hepatopathy,
including Hepatitis B Virus,
alcoholic diseases and...
It’s important to recognize the MDCT findings of IMVS that allow its identification and classification,
since there are important clinical manifestations associated. Knowledge of the imaging features and the drainage pathways are also critical to guide the treatment strategy for symptomatic shunts.
Anatomic variants of mesenteric veins: Depiction with helical CT venography. AJR. 1997;168:1209-1213. Fernandez M,
Anti-VEGF receptor-2 monoclonal antibody prevents portalsystemic collateral vessel formation in portal hypertension mice. Gastroenterology. 2004;126:886–894. Heoung Keun Kang,
Yong Yeon Jeong,
Jun Ho Choi,
Tae Woong Chung.
Multi–Detector Row CT Portal venography in the...