title: Ultrastructural study of Letterer-Siwe disease in three infants, one complicated by pneumocystosis.
mesh_terms: D006644:Histiocytes / Q000648:ultrastructure; D006646:Histiocytosis, Langerhans-Cell / Q000150:complications / Q000473:pathology*; D006801:Humans; D007223:Infant; D008168:Lung / Q000648:ultrastructure*; D008297:Male; D011020:Pneumonia, Pneumocystis / Q000150:complications*; D012867:Skin / Q000648:ultrastructure*