Abstract
Necrobiosis lipoidica (NL) presents clinically as waxy yellow-brown plaques, commonly on the shins. Venous insufficiency also involves the legs; however, it has distinct clinical and pathologic features. We present a series of eight patients who had lesions that clinically resembled NL but on pathology showed features resembling venous insufficiency. Between 1997 and 2008, eight patients were identified at St. Paul's Hospital, Vancouver, to have had skin lesions clinically diagnosed as NL, or a similar morphologic entity, but showing histopathologic features resembling venous insufficiency on biopsy. The clinical records and pathology reports of these patients were reviewed. The patients' ages ranged from 39 to 73 years. Only one patient was female. Members of the group held diagnoses of diabetes, renal failure, or venous or arterial disease. All patients had lesions on the legs, most on the anterior aspect. The clinical diagnosis was generally NL; other clinical impressions included lichen planus, morphea, and Kaposi sarcoma. All patients had features on pathology resembling venous insufficiency and no features of NL. We propose that this unique combination of clinical features of NL and histopathologic features resembling venous insufficiency represents a novel entity for which we propose the name pretibial angioplasia.
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