Primary cutaneous extranodal natural killer/T-cell lymphoma presenting as bilateral erythematous patches on the arms

Ik Jun Moon, Hyun Ji Kang, Mi Woo Lee, Woo Jin Lee

Indian Journal of Dermatology, Venereology, and Leprology 2017 83(4):453-456

Natural killer/T-cell lymphoma is a rare, Epstein–Barr virus-associated type of cytotoxic lymphoma thatpresents mainly in the nasal cavity and its vicinity. Very few cases of primary cutaneous extranodal natural killer/T-cell lymphoma have been reported till date. All the previously reported cases of primary cutaneous extranodalnatural killer/T-cell lymphoma presented as lesions resembling cellulitis, subcutaneous nodules or ulcers. We report a rare case which presented as erythematous and purpuric round patches on the arms and was finally diagnosed as primary cutaneous extranodalnatural killer/T-cell lymphoma, following a skin biopsy. The atypical patchy lesions presented a diagnostic challenge. We herein describe this clinically novel atypical patch-like presentation of primary cutaneous extranodalnatural killer/T-cell lymphoma together with the key histopathologic features and highlights of the previously reported cases.

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