Quiz #25: Echo - Identify the vessel (again)!

Going with the same theme as Quiz #24.

Subcostal sagittal (bicaval) view in a newborn with severe cyanosis.

(Some labels are given. Clue: A vertical vessel flowing downwards, behind the IVC).

Question 1:

1)      Name the vessel shown by arrow.

2)      Provide a possible diagnosis. (I won’t be upset if you gave a second possible diagnosis as well!)

Link to the answer