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Postaxial polydactyly. This is the most common situation, in which the extra digit is on the ulnar side of the hand, thus the side of the little finger. This can also be called postaxial polydactyly. It can manifest itself very subtly, for instance only as a nubbin on the ulnar side of the little finger, or very distinctly, as a fully developed ...
Polysyndactyly is a congenital anomaly, combining polydactyly and syndactyly, in which affected individuals have an extra finger or toe that is connected, via fusing or webbing, to an adjacent digit. [ 1 ] [ 2 ]
Scalp defects-postaxial polydactyly syndrome is a very rare genetic disorder which is characterized by congenital defects of the scalp and type A postaxial polydactyly. [1] [2] An additional finding is severe intellectual disability. It is thought to be inherited in an autosomal dominant manner.
Bardet–Biedl syndrome is a pleiotropic disorder with variable expressivity and a wide range of clinical variability observed both within and between families. The most common clinical features are rod–cone dystrophy, with childhood-onset night-blindness followed by increasing visual loss; postaxial polydactyly; truncal obesity that manifests during infancy and remains problematic ...
The main characteristics of the syndrome are extra fingers and/or toes (polydactyly), with the skin between some fingers or toes potentially fused or "webbed" (cutaneous syndactyly), and a benign mass or lesion in the brain called a hypothalamic hamartoma. [5]
Clinically, McKusick–Kaufman syndrome is characterized by a combination of three features: postaxial polydactyly, heart defects, and genital abnormalities: [citation needed] Vaginal atresia with hydrometrocolpos; Double vagina and/or uterus. Hypospadias, chordee (a downward-curving penis), and undescended testes (cryptorchidism).
Meckel-Gruber syndrome is a rare, lethal ciliopathic genetic disorder, characterized by renal cystic dysplasia, central nervous system malformations (occipital encephalocele), polydactyly (postaxial), hepatic developmental defects, and pulmonary hypoplasia due to oligohydramnios. [1] [2] Meckel–Gruber syndrome is named for Johann Meckel and ...
Mutations in this gene have been associated with several diseases, including Greig cephalopolysyndactyly syndrome, Pallister–Hall syndrome, preaxial polydactyly type IV, and postaxial polydactyly types A1 and B. [6] DNA copy-number alterations that contribute to increased conversion of the oncogenes Gli1–3 into transcriptional activators by the Hedgehog signaling pathway are included in a ...