Case 27 Answer

Answer: Right ovarian vein thrombosis (possibly thrombophlebitis) 

 Note the dilated, hyperdense right ovarian veins. Stranding suggests phlebitis (check with labs)

Blue arrow denotes the dilated, hypderdense ovarian veins. 

 Remember the anatomy - R gonadal vein drains into the IVC while the L gonadal vein drains into the L renal vein More inferiorly you can see the abnormal veins surrounding the right ovary. 

Classic patient is ~1 wk postpartum with fever and RLQ pain.  Non-OB/GYN tend to think appendicitis but this is not a rare postpartum complication so always check out the veins when you can  - even on a non-contrast exam!