Treatment of cornual pregnancy in a patient with adenomyosis by high-intensity focused ultrasound (HIFU) ablation: A case report.

RATIONALE: Cornual ectopic pregnancy in adenomyosis patients is a rare clinical condition, which may require careful approach for accurate diagnosis and treatment.

PATIENT CONCERNS: A 38-year-old woman presented with amenorrhea for 8 weeks and serum HCG levels of 1455 mmol/L. The B ultrasound showed an endometrial thickness of 1.7 cm, and the presence of a cystic structure (16 6 mm) at the right uterine horn. Color Doppler flow imaging (CDFI) accurately detected and confirmed the position of the cystic structure with its clear boundaries.

DIAGNOSES: Cornual ectopic pregnancy in adenomyosis.

INTERVENTIONS: The diagnosis was confirmed and treated by HIFU ablation. Total ablation was performed for 738 seconds without any bleeding.

OUTCOMES: Serum HCG levels decreased to < 0.1 mmol/L after 60 days post operation, and follow-up for 11 months showed a regular menstrual cycle without dysmenorrhea. Gestational sac was not obvious at postoperative 90 days by MRI. The adenomyosis associated lesion with blood perfusion became smaller at postoperative 90 days.

LESSONS: In this case, we successfully performed HIFU ablation and treated the cornual ectopic pregnancy in an adenomyosis patient for the first time, without any adverse complications.