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conjoined twins


Definition: monozygotic twins with varying extent of union and different degrees of residual duplication. The various types of union are named by the use of a prefix designating the region that is united and adding the suffix -pagus, meaning joined (craniopagus [united by the heads], thoracopagus [united in thoracic region]); the various types of residual duplication are named by designating the parts duplicated and adding the suffix -didymus, or -dymus, meaning twin (cephalodidymus, cephalodymus).

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.