Adnexal ring of ectopic pregnancy detected by contrast-enhanced CT.

We present a case of a 37-year-old woman who presented with acute right lower quadrant abdominal pain. Work up with contrast enhanced CT to rule out appendicitis revealed dramatic ring enhancing cystic structure in the right adnexa corresponding to tubal ring sign of ectopic pregnancy seen on subsequent pelvic ultrasound. Right tubal ectopic pregnancy was confirmed at surgery.