Squamous Cell Lung Carcinoma Presenting with Erythema Annulare Centrifugum

Erythema annulare centrifugum (EAC) is a permanent or migrating eruption characterized by annular, arcuate, or polycyclic erythematous lesions that expand to the periphery when the medial parts fade. The pathogenesis of erythema annulare centrifugum is unknown, but it is probably due to a hypersensitivity reaction to a variety of agents, including drugs, arthropod bites, infections, ingestion, and malignancy.. We describe here a 52 year-old man affected by EAC; who upon further examination was diagnosed as squamous cell carcinoma of the lung (SCCL). This is the first case of EAC presented with SCCL to our knowledge. Etiology oriented research performed on EAC patients will help in early diagnosis and treatment of malignancies.