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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]
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 ...
When FGF signaling dynamics and regulatory processes are altered, postaxial polydactyly and cutaneous syndactyly, two phenotypic abnormalities collectively known as polysyndactyly, can occur in the limbs. Polysyndactyly is observed when an excess of Fgf4 is expressed in limb buds of wild-type mice.
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 ...
Short rib-polydactyly syndrome; Short rib-polydactyly syndrome, Beermer type; Short rib-polydactyly syndrome, Majewski type; Short rib-polydactyly syndrome, Saldino-Noonan type; Short rib-polydactyly syndrome, Verma-Naumoff type; Short ribs craniosynostosis polysyndactyly
A bone tumor is an abnormal growth of tissue in bone, traditionally classified as noncancerous (benign) or cancerous (malignant). [1] [4] Cancerous bone tumors usually originate from a cancer in another part of the body such as from lung, breast, thyroid, kidney and prostate. [1] There may be a lump, pain, or neurological signs from pressure. [1]
Polydactyly alopecia seborrheic dermatitis; Polydactyly cleft lip palate psychomotor retardation; Polydactyly myopia syndrome; Polydactyly postaxial dental and vertebral; Polydactyly postaxial with median cleft of upper lip; Polydactyly postaxial; Polydactyly preaxial type 1; Polydactyly syndrome middle ray duplication
The Wassel classification is used to categorise radial polydactyly, based upon the most proximal level of skeletal duplication. [1]