title: Juvenile xanthogranuloma and urticaria pigmentosa.
mesh_terms: D002675:Child, Preschool; D005260:Female; D006644:Histiocytes / Q000473:pathology; D006801:Humans; D008407:Mast Cells / Q000473:pathology; D008854:Microscopy, Electron; D014582:Urticaria Pigmentosa / Q000150:complications* / Q000473:pathology; D014972:Xanthogranuloma, Juvenile / Q000150:complications* / Q000473:pathology