Congenital constriction ring of limbs in subjects with history of maternal substance use.

Abstract excerpt

Congenital Constriction Ring (CCR) is a rare malformation which manifests itself in the form of ring-like constrictive bands. Due to its heterogeneous nature, its etiology remains unclear. Here, we present a series of seven independent individuals afflicted with CCR, which primarily involved the digits. The phenotypic manifestations included terminal phalangeal reduction, anonychia, digit hypoplasia, and...

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