Surgical management of an ectopic pregnancy in the setting of an unexpected Müllerian anomaly: intraoperative and postoperative implications

To describe the intraoperative and postoperative implications arising from the unexpected diagnosis of a Müllerian anomaly during the surgical management of an ectopic pregnancy. Video article. Academic center. A 39-year-old nulligravid woman with anovulation and irregular menstrual cycles presented to the office. Her urine pregnancy test result was incidentally positive; the serum β-human chorionic gonadotropin level was 5,644 mIU/mL. Outpatient transvaginal ultrasonography demonstrated a 2.1 × 1.7 × 2.2–cm thick-walled structure in the left adnexa without an intrauterine pregnancy. These findings were highly suspicious for a left tubal ectopic pregnancy. The patient was consented for laparoscopy with planned left salpingectomy. The patient included in this video gave consent for publication of the video and posting of the video online including social media, the journal website, scientific literature websites (e.g., PubMed, ScienceDirect, and Scopus), and other applicable sites. Diagnostic laparoscopy did not show an obvious left tubal ectopic pregnancy. Instead, a right unicornuate uterus with a dilated rudimentary left uterine horn was seen. Both fallopian tubes and ovaries appeared normal. These laparoscopic findings were consistent with an ectopic pregnancy in the rudimentary horn. However, in the absence of informed consent for a hemihysterectomy and no evidence of ectopic rupture or bleeding within the pelvis, we decided to proceed with excision of the ectopic pregnancy from the uterine horn. An incision was made over the anterior surface of the uterine horn, and the pregnancy sac was dissected from the underlying myometrium and excised in its entirety. Left salpingectomy was also performed. The patient was discharged home the same day, and her β-human chorionic gonadotropin levels decreased to