Diabetic Dermopathy (Diabetic Shin Spots)

Diabetic dermopathy is a common cutaneous manifestation of diabetes mellitus. It was first described by the Swede, Dr. Hans Melin in 1964. The prevalence varies from 0.2 to 35%, and may be more common in type 2 diabetes. There is no apparent sex or racial predisposition. Although it has often been classified as a microangiopathic disorder, studies suggest that other factors such as hyperglycaemia, neuropathy and possibly immune disorders may play a role. Diabetic dermopathy presents with asymptomatic, atrophic, round or roundish, well-defined lesions, located asymmetrically on the shins. They have rarely involved the abdomen and other anatomic sites. Histopathologic features include atrophy of the rete ridges, hyperkeratosis, papillary oedema and telangiectasis, with mucopolysaccharide infiltration of the vessel walls. Therapy is not necessary, as not only is the disorder benign and an incidental finding but it is also spontaneously remitting. Nevertheless, data suggests that laser therapy may help remit lesions.