Rudimentary horn pregnancy in the first trimester; importance of ultrasound and clinical suspicion in early diagnosis: A case report.

We aimed to present 7-8 weeks rudimentary horn pregnancy detected preoperatively. A 37-year-old woman, gravida 3, para 2, at 7-8 weeks' gestation referred to our clinic with a complaint of abdominal pain. The patient was primarily infertile, and she had unicornuate uterus detected during infertility investigation. Due to abnormal ultrasonographic image, rudimentary horn pregnancy was considered. Accurate diagnosis was made by laparoscopy, and rudimentary horn excision was performed. Prerupture diagnosis is very difficult in rudimentary horn pregnancies. The key role in preoperative diagnosis is suspicion. Ultrasonographic examination and clinical suspicion are sufficient in most cases.