Rare coexistence of unilateral erythema nodosum with erysipelas in the area of previous adder bite

. Erysipelas is an acute inflammation of skin and subcutaneous tissue. Erythema nodosum is the most frequent form of panniculitis considered as a reaction to different factors, most commonly infections, especially streptococcal.CASE PRESENTATION. A 74-year-old male presented to hospital due to skin lesions involving the same area he was bitten by an adder six months earlier. On the admission well-demarcated erythema and oedema on the right shin with accompanying fever were noted. Erysipelas was diagnosed and intravenous ceftriaxone was administered. Two days later a few tender nodules within that unilateral location appeared. Based on the clinical and histopathological picture diagnosis of Bävferstedt subtype (erythema nodusum migrans, ENM) was made. The treatment was continued, further followed by doxycycline orally resulting in clinical improvement.CONCLUSIONS. This case presents an unusual coexistence of erysipelas and erythema nodosum migrans, the more it was observed on the primary adder bite area and occurred in a man. Most probably, adder’s venom could lead to disturbed blood and lymph flow what predisposed to erysipelas, which, as streptococcal infection, could trigger ENM.