Juvenile Xanthogranuloma: Case Report and Literature Review.

Juvenile Xanthogranuloma (JXG) is a relatively uncommon non-Langerhans cell histiocytosis, which often occurs at an early age and is usually asymptomatic. Herein, we present the case of a 17-year-old man with numerous asymptomatic yellow-brown papulonodular lesions with a symmetric distribution on upper and lower extremities, face, and trunk, developed over the past 4 years. In the histopathologic examination, histiocytes with a Touton-like appearance were observed in favor of xanthogranuloma. The patient was treated with isotretinoin 20 mg daily for 2 months, which surprisingly led to the progression of lesions and thus was discontinued. Although JXG may cause severe morbidities in some circumstances, it is a self-limiting benign disorder and patients should be assured regarding the benign self-regressive nature of the disease.