SEMECARPUS ANACARDIUM (MARKING NUT)–INDUCED IRRITANT DERMATITIS WITH CONCURRENT CUTANEOUS SMALL VESSEL VASCULITIS: A RARE CASE REPORT

Cutaneous small vessel vasculitis (CSVV) is an uncommon inflammatory disorder characterized by palpable purpura due to immune-mediated injury of dermal small vessels. While most cases are triggered by infections or medications, plant-related causes are rare. We present the case of a 20-year-old male who developed dual dermatological manifestations—irritant dermatitis and cutaneous small vessel vasculitis—following accidental contact with Semecarpus anacardium (marking nut) fluid. Clinical features, histopathological findings, and therapeutic management are discussed, underscoring the importance of recognizing unusual triggers in cutaneous vasculitis for timely diagnosis and treatment.