Congenital Constriction Bands OMIM

Description: Temtamy and McKusick (1978) could find no evidence of a clear or simple genetic basis.
After the work of Streeter (1930), the causative role of amniotic bands was discounted and the malformations, both the bands and the associated absence deformities, were thought to result from tissue necrosis, probably on a vascular basis. However, the work of Torpin (1968) made a modified form of the amniotic band theory plausible. A considerable body of observations indicated that rupture of the amnion and constriction of members which are displaced through holes in the amnion are involved. Amputated parts have been recovered in some instances.