๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
VENOUS LAKE
VENOUS LAKEย ย ICD-10: L98.8
โข A venous lake is a dark blue to violaceous, asymptomatic, soft papule resulting from a dilated venule, occurring on the face, lips, and ears of patients >50 years of age (Fig. 9-22A and B).
โข Etiology unknown, but it has been related to solar exposure.
โข Lesions are few in number and remain for years. A dilated cavity is lined with a single layer of flattened endothelial cells filled with red blood cells and surrounded by a thin wall of fibrous tissue.
โข Because of its dark blue or sometimes even black color, the lesion may be confused with nodular melanoma, pigmented BCC, or pyogenic granuloma.
โข The lesion can be partially compressed and lightened up by diascopy, and the use of dermoscopy assists its diagnosis as a vascular lesion.
โข Management is for cosmetic reasons and can be accomplished with electrosurgery, laser, or, rarely, with surgical excision.
A B
FIGURE 9-22 โข Venous lakeโ(A) On the cheek of a 70-year-old male. The lesion was almost black and became a matter of concern to the patient, who feared he might have melanoma. However, it blanched completely after compression. (B) Venous lake on the auricle of a 75-year-old male. The lesion is dark bluish-red and smooth resembling a basal cell carcinoma. It blanched upon compression.