title: Pathologic quiz case 2. Histiocytosis X, Letterer-Siwe variant.
authors: A B
authors: AB
authors: Fleischer
authors: J T
authors: JT
authors: Woosley
authors: S L
authors: SL
authors: Swanson
authors: D L
authors: DL
authors: Crosby
mesh_terms: D006646:Histiocytosis, Langerhans-Cell / Q000150:complications / Q000473:pathology*; D006801:Humans; D007223:Infant; D008297:Male