In poal hypeension the sites of poosystemic anastomosis includes:-

Poo-Systemic Anastomosis Location Poal component Systemic component Esophagus varices Left gastric vein Azygous vein and accessory hemiazygous vein Rectum and anal Canal Hemorrhoids Superior rectal vein Middle and inferior rectal vein Umbilicus Caput medusa Left branch of poal vein Superficial epigastric veins Posterior abdominal wall Colic and omental veins Retroperitoneal veins of abdominal wall, renal capsule, splenic and hepatic flexure Bare area of liver Hepatic venules Right branch of poal vein Phrenic and intercostal veins Retroperitoneal veins draining into lumbar, azygous and hemiazygous veins Liver Patent ductus venosus left branch of poal vein Inferior vena cava