title: Papular histiocytosis X.
mesh_terms: D001706:Biopsy; D003937:Diagnosis, Differential; D005260:Female; D006646:Histiocytosis, Langerhans-Cell / Q000473:pathology*; D006801:Humans; D007223:Infant; D007299:Insect Bites and Stings / Q000175:diagnosis; D012867:Skin / Q000473:pathology* / Q000648:ultrastructure