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The scientific name for the condition is syndactyly, although this term covers both webbed fingers and webbed toes. Syndactyly occurs when apoptosis or programmed cell death during gestation is absent or incomplete. Webbed toes occur most commonly in the following circumstances: [1] Syndactyly or familial syndactyly; Down syndrome
Absent tibia-polydactyly-arachnoid cyst syndrome, also known as Holmes-Collins syndrome, is a very rare multi-systemic hereditary disorder which is characterized by facial dysmorphisms, [1] pre/post-axial polydactyly, toe syndactyly, missing/underdeveloped tibia bone, and the presence of a retrocerebellar arachnoid cyst.
Preaxial polysyndactyly, in which the duplicated digit is on the side of the thumb or big toe, is less common. [3] Crossed polysyndactyly, in which polysyndactyly is present on the hand and foot, and is preaxial on one and postaxial on the other, is extremely rare and often occurs with other genetic disorders.
Webbing between the second and third finger and between the second and third toes [2] Short fingers and toes (brachydactyly) [4] Broad thumb and/or a broad hallux (big toe) with a valgus deformity (outward angulation of the distal segment of a bone/joint) [6] Hands have a single palmar flexion crease [3]
Syndactyly can be simple or complex. [2] In simple syndactyly, adjacent fingers or toes are joined by soft tissue. In complex syndactyly, the bones of adjacent digits are fused. The kangaroo exhibits complex syndactyly. Syndactyly can be complete or incomplete. In complete syndactyly, the skin is joined all the way to the tip of the involved ...
Owls, ospreys and turacos can rotate the outer toe (4) back and forth. [10] Heterodactyl: two toes in front (3, 4) and two in back (2, 1) – the inner front toe (2) is reversed; heterodactyl arrangement only exists in trogons. [20] Syndactyl: three toes in front (2, 3, 4), one in back (1); the inner and middle (2, 3) are joined for much of ...
Synpolydactyly is a combination of syndactyly and polydactyly. This image shows the hand morphology of an individual with polydactyly. SPD is inherited in an autosomal dominant pattern, meaning that an individual only needs to inherit one copy of the affected gene, also known as an allele, from either parent to potentially develop the condition.
Acrocephalosyndactyly presents in numerous different subtypes, however, considerable overlap in symptoms occurs. Generally, all forms of acrocephalosyndactyly are characterized by atypical craniofacial, hand, and foot characteristics, such as premature closure of the fibrous joints in between certain bones of the skull, [16] [17] fusion of certain fingers or toes, [16] [18] and/or more than ...