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Thumb hypoplasia is a spectrum of congenital abnormalities of the thumb varying from small defects to complete absence of the thumb. [1] It can be isolated, when only the thumb is affected, and in 60% of the cases [ 2 ] it is associated with radial dysplasia [ 1 ] (or radial club, radius dysplasia, longitudinal radial deficiency).
This mutation may cause a reduction in dorsalising signals, which then results in the failure to normally develop dorsal specific structures such as nails and patellae. [10] Other common abnormalities include elbow deformities, kidney disease, [ 11 ] and abnormally shaped pelvic (hip) bones.
Radial club hand with thumb missing (ectrodactyly) Radial dysplasia , also known as radial club hand or radial longitudinal deficiency , is a congenital difference occurring in a longitudinal direction resulting in radial deviation of the wrist and shortening of the forearm.
Mallet finger is acquired due to injury to the thin extensor tendon that functions to straighten the end (DIP) joint of a finger. [8] Jamming of the finger induces a rupture of the extensor tendon or a broken bone at the tendon's site of attachment. [9] This results in a droopy and crooked appearance of the end joint of the finger, resembling a ...
Limb defects occur in up to 70 percent of babies with VACTERL association and include a displaced or hypoplastic thumb, extra digits (polydactyly), fusion of digits and forearm defects such as radial aplasia. Babies with limb defects on both sides tend to have kidney or urologic defects on both sides, while babies with limb defects on only one ...
Trapeziometacarpal osteoarthritis (TMC OA) is, also known as osteoarthritis at the base of the thumb, thumb carpometacarpal osteoarthritis, basilar (or basal) joint arthritis, or as rhizarthrosis. [ 3 ] [ 1 ] [ 2 ] This joint is formed by the trapezium bone of the wrist and the metacarpal bone of the thumb.
Ulnar dysplasia also known as ulnar longitudinal deficiency, ulnar club hand or ulnar aplasia/hypoplasia is a rare congenital malformation which consists of an underdeveloped or missing ulnae bone, causing an ulnar deviation of the entire wrist. The muscles and nerves in the hand may be missing or unbalanced.
Symbrachydactyly is a congenital abnormality, characterized by limb anomalies consisting of brachydactyly, cutaneous syndactyly and global hypoplasia of the hand or foot. [1] In many cases, bones will be missing from the fingers and some fingers or toes may be missing altogether.