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Obstetrics & Gynecology 2007;110:1301-1303
© 2007 by The American College of Obstetricians and Gynecologists
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ORIGINAL RESEARCH

Analysis of Arterial Blood Vessels Surrounding the Myoma

Relevance to Myomectomy

Federico Discepola, MD1, David A. Valenti, MD1, Caroline Reinhold, MD1 and Togas Tulandi, MD, MHCM1

From the 1Departments of Radiology and Obstetrics and Gynecology, McGill University, Montreal, Quebec, Canada.

OBJECTIVE: The optimal direction of myomectomy incision in relation to the blood vessels is unclear. Accordingly, we evaluated the location and course of arterial blood vessels surrounding the myoma.

METHODS: This study is a retrospective analysis of 592 arterial blood vessels in 60 patients with symptomatic uterine leiomyomata undergoing uterine artery embolization.

RESULTS: We encountered 592 arterial blood vessels surrounding the myoma. The vessels could be seen encircling the surface of the myoma. The dominant myoma was located on anterior (n=30), posterior (n=17), and fundal part of the uterus (n=13). There was no difference in the diameter (6.9±2.7 cm, 5.8±0.7 cm, and 6.7±0.5 cm) and volume of the myoma (268.6±52.7 cm3, 197.0±64.5 cm3, and 199.3±40.5 cm3) among anterior, posterior, and fundal, respectively. The vessels were graded as coursing with angles of 0–30 degrees, 30–60 degrees, and 60–90 degrees. There were significantly more blood vessels in the 30–60 degree group among anterior myoma (n=88, 42.5%) than in 0–30 degree (n=59, 28.5%, P=.004, 95% confidence interval [CI] 0.36–0.81) and 60–90 degree groups (n=60, 29.0%, 95% CI 1.2–2.7). Similar findings were found among posterior myoma (0–30 degrees n=26, 21.7%; 30–60 degrees n=59, 49.2%; P<.001, 95% CI 0.16–0.50; 60–90 degrees 35 (29.2%), P<.002, 95% CI 1.37–3.9). Among fundal myomas, there was no difference in the number of vessels in the 0–30 degree (n=28, 28.6%), 60–90 degree (n=40, 40.8%), and in 60–90 degree groups (n=30, 30.6%).

CONCLUSION: Arterial blood vessels travel mostly diagonally on the surface of anterior and posterior myomas. There was no predominant pattern in the course of the arteries on fundal myomas. These findings suggest that regardless of the direction of the myomectomy incision, arterial blood vessels on myoma surface could be injured.

LEVEL OF EVIDENCE: II






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