Abstract

Langerhans’ cell histiocytosis (LCH) is a rare pediatric disease of unknown etiology. The mastoid and skull base are com - mon sites of involvement in LDH. We present a case of bilateral langerhans histiocytosis in 9-month-old infant presented with bilateral post auricular swelling for 2 month mimic the picture of acute mastoiditis. Patient diagnosed after CT scan and open biopsy from mastoid cavity.