title: Urticaria pigmentosa discordant in identical twins.
mesh_terms: D001789:Blood Group Antigens; D002648:Child; D004200:Diseases in Twins; D005260:Female; D006339:Heart Rate; D006801:Humans; D007621:Karyotyping; D008407:Mast Cells; D010375:Pedigree; D010551:Personality; D014582:Urticaria Pigmentosa / Q000235:genetics*
chemical_list: D001789:Blood Group Antigens