title: Ultrastructural study of mast cells in mastocytosis.
mesh_terms: D006801:Humans; D007223:Infant; D008407:Mast Cells / Q000648:ultrastructure*; D008854:Microscopy, Electron; D012867:Skin / Q000648:ultrastructure*; D014582:Urticaria Pigmentosa / Q000473:pathology*