Uterine arteriovenous malformation with positive serum B- HC
Introduction
Although uterine arteriovenous malformation (AVM) is known in gynecologic practice to be a rare disease, it seems to occur more frequently than has been reported in the literature. These lesions consist of abnormal vascular proliferations and multiple variable-sized arteriovenous communications between intramural branches of the uterine artery and the myometrial venous plexus.

Here we present a case of a large uterine AVM accompanied by positive serum beta-human chorionic gonadotropin (?-hCG) with excessive vaginal bleeding. To our knowledge, it is the largest diameter of AVMs in comparison to published case reports in Korea. The patient's condition, diagnosis and treatment are reviewed in the hope that management of uterine AVM, thereby, can be rendered more consistently effective and safe.

Case report
A 38-year-old woman, gravida 4, para 2, was referred to our hospital for a suspicious hypervascular uterine mass. She presented prolonged and profuse vaginal bleeding for 2 months. Her previous menstrual cycles had been regular and her last menstruation was 3 months previously. She had a history of two cesarean sections and two artificial dilation and curettage. On observation of the uterine cavity at the time of the second cesarean section 5 years earlier, there were no abnormal findings. Also, there was no abnormal vaginal bleeding during and after the last dilation and curettage in 2012. Her medical histories were unremarkable. Her vital signs were stable. The initial hemoglobin level, 12.4 g/dL, decreased to 10.9 g/dL after her hospitalization. The serum ?-hCG level was slightly elevated, to 496 mIU/mL....

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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5120079/
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