Abstract
Rudimentary horn pregnancy (RHP) is a special type of ectopic pregnancy and its pathophysiological basis is an abnormal fusion of the bilateral accessory mesonephric duct during the embryonic period. If sonographers lack experience to this disease, it is easily to be misdiagnosed in the early period, which often leads to rupture of the pregnant horn and life-threatening bleeding. Therefore, a high index of vigilance is required. We present a case of a 27-year-old female who went to the department of emergency due to menopause, pelvic pain and elevated human chorionic gonadotropin (hCG) (above 200,000 IU/L). Sonographic examination showed uterus only had the right horn and endometrium was thickened about 1.7 cm without gestational sac (GS) in the uterine cavity. Besides, a 3.5×3.0 cm GS was found between the left ovary and corpus uteri. RHP was suspected by sonographer, and the patient underwent laparoscopy. Obstetricians and gynecologists removed the rudimentary horn and the left fallopian tube. The patient made a good recovery and was soon discharged home after surgery. This article analyzed one case and summarized ultrasonic characteristics of RHP which may help to improve the early diagnosis of RHP. If necessary, other imaging such as magnetic resonance imaging (MRI) can be combined to make a clear diagnosis and treatment as soon as possible.
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