title: The acardiac anomaly new case reports and current status.
abstract: Two cases of holoacardius are presented. Both had a normal 46,XX female karyotype, identical to that of their respective cotwin. Data are presented supporting the concept that the placental vascular anastomoses are the primary agents in the formation of an acardiac. Cytogenetics, epidemiology and other theories of pathogenesis are discussed.
mesh_terms: D002478:Cells, Cultured; D002877:Chromosomes, Human; D005260:Female; D006330:Heart Defects, Congenital / Q000235:genetics* / Q000473:pathology; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008214:Lymphocytes / Q000648:ultrastructure; D011247:Pregnancy; D014427:Twins; D014430:Twins, Monozygotic