Langerhans cell histiocytosis (HSL) or histiocytosis X, eosinophilic
granuloma, letterer siwe disease, hand schuller christian disease and
hashimoto pritzker disease is a disorder caused by the accumulation
and proliferation of langerhans cells in various organs of the body that
causes tissue damage. The highest prevalence of HSL occurs in
children less than 3 years old, with a ratio of 2:1 for boys and girls.
The classic appearance of skin manifestations is an eruption
resembling seborrheic dermatitis in the folds, axillae, scalp,
retroauricular and trunk areas. The appearance of the lesion is yellow
to brownish red papules, purpuric and crusted papules that can occur
together with erosion