Venous lake is most often diagnosed in middle-aged or older men and women of any race.
What is the cause of a venous lake?
The cause of venous lake is unknown.
What are the clinical features of a venous lake?
A venous lake is a soft, squashable, blue or purple macule or papule, that is 0.2–1 cm in diameter. Although they may arise anywhere, most venous lakes are diagnosed on the lower lip (on the vermilion margin or mucosal surface), on an ear lobe, or elsewhere on face, neck, or upper trunk.
Effect of compression on a venous lake
How is a venous lake diagnosed?
A venous lake is usually easy to diagnose clinically by its appearance. The colour disappears on compression of the macule or papule due to the clearance of blood from the dilated venule. This is most easily seen using a glass slide or the lens of a contact dermatoscope. A venous lake has a structureless blue or purple appearance on dermoscopy. Biopsy is rarely necessary, and shows a dilated venule.
What is the differential diagnosis for a venous lake?
A venous lake is harmless and does not require treatment. A lesion that is unsightly can be removed by destroying the lesion. This causes a temporary scab, and the procedure may result in a scar. Treatments to remove a venous lake include: