The use of topical Rapamycin in successfully treating non-Langerhans cell histiocytosis in a pediatric patient

Abstract

Non-Langerhans cell histiocytosis (non-LCH) refers to a collection of medical conditions distinguished by the excessive growth of histiocytes in bodily tissues. It is important to note that these conditions do not meet the established diagnostic criteria for Langerhans cell histiocytosis (LCH). Juvenile xanthogranuloma (JXG) and benign cephalic histiocytosis (BCH) represent the prevailing forms of cutaneous non-LCH. We present a case of JXG which responded to topical treatment with a 0.1% topical ointment of Rapamycin. Rapamycin, an immunosuppressive and antineoplastic agent, can thus be a viable alternative non-invasive topical modality for managing JXG. However, it is imperative to conduct prolonged observations to evaluate the efficacy and potential adverse reactions.