title: Etiological aspects of double monsters.
abstract: Four cases of double monsters are reported, including a rare case of craniofacial duplication (diprosopus). Based on the findings observed, etiological factors of these malformations are discussed. We suggest that exogenous (environmental) factors such as habits, way of life or religious practices of certain populations can influence the development of double monsters.
mesh_terms: D009008:Abnormalities, Severe Teratoid / Q000209:etiology*; D000328:Adult; D000757:Anencephaly / Q000209:etiology; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D014428:Twins, Conjoined / Q000209:etiology