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Skin blood flow in necrobiosis lipoidica during treatment with low-dose acetylsalicylic acid.

Skin blood flow was measured by the laser Doppler technique in lesional and clinically normal skin of 10 diabetic patients with necrobiosis lipoidica during and after treatment with 40 mg acetylsalicylic acid (ASA) daily. The measurements showed that the blood flow during ASA treatment was significantly decreased in the central lesional skin without changes in the peripheral part of the lesions and normal skin. In view of these findings we suggest that low-dose ASA may not be the best treatment for necrobiosis lipoidica.