Prerupture diagnosis of a pregnant rudimentary uterine horn.

This clinical case reports prerupture diagnosis of a rudimentary horn pregnancy in a 27-year-old formerly healthy woman presented with moderate to severe suprapubic abdominal pain at the gestational age of 12 + 0 weeks. The suspected diagnosis of this pregnant rudimentary horn via transvaginal ultrasound was acknowledged during an emergency exploratory laparotomy. The simple transvaginal ultrasound criteria suggested by the present study would help clinicians avoid time-consuming inefficient investigative procedure and rule out this rare life-threatening condition by taking into account the rudimentary horn pregnancy as a differential diagnosis in patients presenting with abdominal pain.