Interstitial granulomatous dermatitis: Rare cutaneous manifestation of rheumatoid arthritis

Abstract

Besides being an uncommon clinicopathological entity, interstitial granulomatous dermatitis, also described as interstitial granulomatous dermatitis with arthritis (IGDA), has shown a wide spectrum of clinical manifestations, such as linear and erythematous lesions, papules, plaques and nodules. Histological features include dense dermal histiocytic infi ltrate, usually in a palisade confi guration, and scattered neutrophils and eo-sinophils. We describe a middle aged woman with rheumatoid arthritis of diffi cult management and cutaneous lesions compatible with IGDA.