Lateral Presentation of the Tubercle of the Upper Lip in a Male

Description

Seen in lateral profile, the tuberculum labii superioris forms a focal convexity at the midline of the upper lip, projecting from the vermilion (pars vermilionis) just inferior to the philtrum and anterior to the maxillary incisors. The vermilion border arcs from the labial commissure toward the cupid’s bow (arcus cupidinis), where the central tubercle creates a subtle anterior step compared with the adjacent paramedian vermilion. Superiorly, the tubercle blends into the cutaneous lip at the vermilion-cutaneous junction, while inferiorly it overhangs the oral fissure, defining the lip’s free margin. Lateral assessment of the upper-lip tubercle matters in facial analysis and in planning aesthetic and reconstructive procedures that aim to restore midline contour rather than simply lip volume. A small asymmetry here reads as deviation of the cupid’s bow, and after cleft lip repair or traumatic laceration, tubercle malposition often signals misalignment of the orbicularis oris and vermilion height mismatch. Surgeons also reference this prominence when placing fillers or performing lip lift and vermilion advancement, since overcorrection can flatten the natural central pout or produce an unnatural anterior projection in profile. Profile is unforgiving. Use this illustration in head and neck anatomy teaching, facial aesthetic injection training, and plastic surgery or dermatologic surgery references that require Terminologia Anatomica naming alongside clinically recognizable surface landmarks. It also suits patient-facing procedure consent materials where a clear lateral view of the cupid’s bow and central vermilion prominence helps set expectations. Anatomical accuracy verified by SciePro's Medical Advisory Board.