Fig 1.
Clinical, dermoscopic, and histopathologic pictures of venous lake on the lips.
(a) A dark blue papule located on the upper lip. (b) Histopathologic findings showing dilated vascular spaces and thrombi located within the vascular spaces in the upper dermis. (hematoxylin and eosin, ×40). (c) Nonpolarized dermoscopic images of venous lake taken without the use of interface fluid. (d) Polarized dermoscopic images of venous lake. Polarized dermoscopy enables better observation of color and white structures than nonpolarized dermoscopy. Venous lake shows globules/clods (black arrows), a structureless pattern (yellow arrow), and white structures (white arrows).
Table 1.
Demographic findings of cases of venous lakes and labial melanotic macules on the lips.
Table 2.
Dermoscopic patterns and colors observed in venous lake and labial melanotic macules on the lips.
Fig 2.
Dermoscopic findings and clinical images (insets) of venous lake on the lips and labial melanotic macules.
(a) Venous lake on the lower lip showing a purple to red structureless pattern with white structures (white arrows) and linear-irregular vessels (yellow arrows). (b) Labial melanotic macule on the upper lip composed of brown parallel lines (black arrows).
Table 3.
Clinical and dermoscopic features of venous lake, labial melanotic macule, and oral malignant melanoma.