title: Pigment anomalies of the skin in the human chimaera: their relation to systematized naevi.
abstract: Double fertilization of the egg may lead to a chimaeric state, in which the cell composition of the individual derives from two zygotes. Some special types of naevoid hyperpigmentation may result. Two new cases are added to the three published cases of chimaerism with skin manifestations.
mesh_terms: D000328:Adult; D001789:Blood Group Antigens; D002678:Chimera; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D009508:Nevus, Pigmented / Q000175:diagnosis; D010859:Pigmentation Disorders / Q000097:blood / Q000175:diagnosis / Q000235:genetics*; D012878:Skin Neoplasms / Q000175:diagnosis
chemical_list: D001789:Blood Group Antigens