Diagnosis: Thrombosed venous lake
Comment: Venous lakes are common vascular ectasias. Soft, dark-blue, often multiple, papules
Common site: Ears, face, lips, or neck of the elderly. Minor trauma to the lesions may produce persistent bleeding.
Microscopic: Usually only a single large dilated vascular channel is present, in the upper dermis. Very thin fibrous wall and a flat endothelial lining. Thrombus is sometimes present in the lumen . These lesions appear to represent a dilated segment of a vein or venule.
CONTRAST WITH ANGIOKERATOMA
- Hemangioma involving upper dermis and extending into overlying epidermis.
- Epidermal hyperplasia and hyperkeratosis.
- (Angio + keratinocyte + oma = Angiokeratoma)
Deba P Sarma, MD, Omaha