CT findings of REPWH. The patient presented with lower abdominal pain for a period of 2 h. This patient had a history amenorrhea for 2 months and irregular vaginal bleeding for 1 month; β-HCG test was positive; no signs of gestational sac were observed; left isthmus ectopic pregnancy was confirmed by surgery. The single arrow indicates the mixed-density pelvic effusion; the front shorter arrow indicates the location of the uterus, which does not exhibit any signs of cystic shadow