Bluish dome-shaped nodule of the lip.

A patient with a lymphangioma involving the labial commissure is reported. Key features of this disorder include its occurrence in young patients, asymptomatic nature, compressibility, and slow growth. Clinicians should understand that the lymphangioma may appear as a soft, grayish-blue, dome-shaped nodule, an irregular and papillary vesicular mass, or as a diffuse swelling. Appropriate clinical and radiographic tests are recommended before surgical excision. Histologically, the features of the lymphangioma may closely resemble those of a hemangioma.