I was talking with one of the Radiologists the other day and she gave me some information about various pathologies. One, in particular, was called Caput Medusae. This occurs when the inferior vena cava is blocked off and veins grow from the umbilical vein around the blockage to bypass it so that venous blood can flow back to the heart. In sectional anatomy it looks like Medusa's hair. (Medusa was a mythical creature with snakes coming out of her head. Caput Medusae often happens to infants or to people that have cirrhosis of the liver. I have uploaded some pictures. One of what Medusa looks like and the other two is what Caput Medusae looks like in a CT scan.
References:
Dr. Dugan, M.D.
vroma.org
scielo.br
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