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Erythema nodosum and hepatitis B: a case report and literature review.

Erythema nodosum (EN) is the most common of the panniculitides, and is associated with many underlying etiological conditions. Herein, we report a case of EN with probable association with hepatitis B virus (HBV) and review previous reports in the English literature. Since hepatitis B is still an endemic infection in Taiwan, EN related to HBV may not be as uncommon as in developed countries. The incidence and pathogenesis of EN associated with HBV demand further investigation.