varus angulation, and the sixth toe has substantial valgus angulation. X-ray of type III central polydactyly (the middle fingers are the same length). Classification is performed by using x-ray imaging to see the bone structures. Ulnar polydactyly Type 1 ulnar polydactyly – an extra digit is attached by skin and nerves. The classification of ulnar polydactyly exists of either two or three types. The two-stage classification, according to Temtamy and McKusick, involves type A and B. In type A there is an extra little finger at the metacarpophalangeal joint, or more proximal including the carpometacarpal joint. The little finger can be hypoplastic or fully developed. Type B varies from a nubbin to an extra, non-functional little finger part on a pedicle. According to the three-type classification, type I includes nubbins or floating little fingers, type II includes duplications at the MCPJ, and type III includes duplications of the entire ray. Radial polydactyly The Wassel classification is the most widely used classification of radial polydactyly, based upon the most proximal level of skeletal duplication. The most common type is Wassel 4 (about 50% of such duplications) followed by Wassel 2 (20%) and Wassel 6 (12%). Central polydactyly The classification of central polydactyly is based on the extent of duplication and involves the following three types: Type I is a central duplication, not attached to the adjacent finger by osseous or ligamentous attachments; it frequently does not include bones, joints, cartilage, or tendons. Type IIA is a nonsyndactylous duplication of a digit or part of a digit with normal components, and articulates with a broad or bifid metacarpal or phalanx. Type IIB is a syndactylous duplication of a digit or part of a digit with normal components, and articulates with a broad or bifid metacarpal or phalanx. Type III is a complete digital duplication, which has a well-formed duplicated metacarpal.
picture of Acrocallosal syndrome
medical cause of Arcus senilis
symptom of Oculopharyngeal muscular dystrophy
symptom of Buschke–Ollendorff syndrome
symptom of Romano–Ward syndrome
symptom of Nuchal cord
symptom of Spinocerebellar ataxia type 1
symptom of Pierre Robin sequence