Caliber-persistent labial artery: report of 3 cases

Abstract

The caliber-persistent labial artery is a vascular anomaly in which a primary arterial branch penetrates into the submucosal tissue without reduction in diameter. Most lesions are benign and do not require treatment, except for complications and/or on patient demands. In this way, noninvasive diagnostic tools are preferred such as high-resolution and color Doppler ultrasonography which allow direct observation of the lesion, assessing its exact location and diameter at every axis, as well as the blood flow velocity. An excisional biopsy of these lesions or even their surgical extirpation could have a fatal outcome with profuse bleeding.

Intralabial Lip Compartments and Their Potential Clinical Relevance

“…However, numerous studies have been published providing robust scientific evidence that the labial arteries (superior and inferior) are most frequently found within the posterior compartments, thus potentially increasing the risk of adverse vascular events. [15][16][17][18][19] The effects on clinical aesthetic outcome when targeting anterior versus posterior lip compartments is unclear. However, from a safety perspective, injecting the posterior compartments might pose a greater risk of intravascular occlusion, as the labial arteries are most commonly found posteriorly.…”