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The experience of collecting 120 transhepatic portograms, performed in patients with different degrees of portal hypertension, affords the opportunity for discussing the anatomical and hemodynamic features of portosystemic communications. Multiple pathways of decompression were found. The coronary-gastroesophageal collateral formed pathways in 108 cases, other major collaterals in 41, and minor collaterals in 2. This multiplicity of communications suggests that no one vessel is indispensable as a collateral pathway.
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