Female infant with a right ovarian cyst on prenatal ultrasound and an incidental abdominal calcification noted on a CXR

Surgical image of ovarian torsion
Surgical image shows a large circular and soft mass that was adherent to, but not invading, the hepatic flexure, omentum, and distal ileum and which was no longer connected to any pelvic structures. There was no ovarian tissue in the right adnexa. The left ovary was normal.

The diagnosis was ovarian torsion that most likely occured in-utero.