This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ectopic Pregnancy (Hello ! Where are you ?), Subject name: Gynaecology & Obstetrics
An ectopic pregnancy implanted in the ovary clinically may most closely mimic which of the following? 
Select and explain. 
A. Ovarian torsion, B. Corpus luteum cyst rupture, C. Uterine horn pregnancy rupture, D. Interstitial ectopic pregnancy rupture
B: Corpus luteum cyst rupture
Answer: B: Corpus luteum cyst rupture 
Explanation: * Findings of ectopic pregnancy in ovary are likely to mimic those of a tubal pregnancy or a bleeding corpus luteum. * At surgery, early ovarian pregnancies are likely to be considered corpus luteum cysts or a bleeding corpus luteum.