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Chondrodermatitis nodularis chronica helicis (CNCH) is a cutaneous lesion of the external ear characterized by spontaneously evolving tender nodule over the apex of helix or antihelix.
The patient was diagnosed as CNCH on the basis of history and examination.
Santa Cruz in 1980 had found the natural history and histology to be similar to a group of disorders characterized by transepithelial elimination known as the perforating dermatoses.4 Upile et al.5 in 2009 designed a detailed histopathological review of 16 confirmed cases of CNCH. The study revealed arteriolar narrowing in perichondrium region of pinna most remote from arterial blood supply, i.e.
Although CNCH is regarded as an idiopathic disorder in general with no systemic associations, exceptions to this have been reported in literature and cases may occasionally be associated with autoimmune or connective- tissue disorders,6-8 including autoimmune thyroiditis, lupus erythematosus, dermatomyositis, and scleroderma.
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