Urticaria pigmentosa in two pairs of monozygotic twins.
D000328:Adult; D002675:Child, Preschool; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D011247:Pregnancy; D014427:Twins; D014430:Twins, Monozygotic; D014582:Urticaria Pigmentosa / Q000235:genetics*