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  2. Polydactyly - Wikipedia

    en.wikipedia.org/wiki/Polydactyly

    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 ...

  3. Polysyndactyly - Wikipedia

    en.wikipedia.org/wiki/Polysyndactyly

    Polysyndactyly may be classified by the level of duplication. The extra digit may be small and comprise only soft tissue, [7] but usually includes at least one bone, most commonly the distal and middle phalanges. [4] [8] Partial or complete duplication of the proximal phalanx, metacarpal or metatarsal can also occur. [4] [7]

  4. Ectrodactyly with tibia aplasia/hypoplasia - Wikipedia

    en.wikipedia.org/wiki/Ectrodactyly_with_tibia...

    Ectrodactyly with tibia aplasia/hypoplasia also known as cleft hand absent tibia is a very rare limb malformation syndrome which is characterized by ectrodactyly, and aplasia/hypoplasia of the tibia bone. Additional findings include cup-shaped ears, pre-postaxial polydactyly, and hypoplasia of the big toes, femur, patella, and ulnae bone. It is ...

  5. Anatomical terms of bone - Wikipedia

    en.wikipedia.org/wiki/Anatomical_terms_of_bone

    Bones are commonly described with the terms head, neck, shaft, body and base. The head of a bone usually refers to the distal end of the bone. The shaft refers to the elongated sections of long bone, and the neck the segment between the head and shaft (or body). The end of the long bone opposite to the head is known as the base.

  6. Ectrodactyly-polydactyly syndrome - Wikipedia

    en.wikipedia.org/wiki/Ectrodactyly-polydactyly...

    Ectrodactyly-polydactyly syndrome is a very rare congenital limb malformation syndrome of genetic origin which is characterized a combination of ectrodactyly and polydactyly [1] consisting of underdeveloped/absent central rays of the hands or feet alongside postaxial polydactyly in the same limb that can range from a hypoplastic, bone-devoid extra digit to a fully developed supernumerary digit ...

  7. Wassel classification - Wikipedia

    en.wikipedia.org/wiki/Wassel_classification

    The Wassel classification is used to categorise radial polydactyly, based upon the most proximal level of skeletal duplication. [1]

  8. Bardet–Biedl syndrome - Wikipedia

    en.wikipedia.org/wiki/Bardet–Biedl_syndrome

    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 ...

  9. Absent tibia-polydactyly-arachnoid cyst syndrome - Wikipedia

    en.wikipedia.org/wiki/Absent_tibia-polydactyly...

    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.