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A fracture of the fourth and/or fifth metacarpal bones transverse neck secondary due to axial loading is known as a boxer's fracture. [1] [[[Boxer%27s_fracture#{{{section}}}| contradictory]]] The fifth metacarpal bone is the most common bone to be injured when throwing a punch.
A boxer's fracture is the break of the fifth metacarpal bone of the hand near the knuckle. [4] Occasionally, it is used to refer to fractures of the fourth metacarpal as well. [1] Symptoms include pain and a depressed knuckle. [2] Classically, it occurs after a person hits an object with a closed fist. [3]
The index metacarpal is the most firmly fixed, while the thumb metacarpal articulates with the trapezium and acts independently from the others. The middle metacarpals are tightly united to the carpus by intrinsic interlocking bone elements at their bases. The ring metacarpal is somewhat more mobile while the fifth metacarpal is semi ...
The intermetacarpal joints are in the hand formed between the metacarpal bones. The bases of the second, third, fourth and fifth metacarpal bones articulate with one another by small surfaces covered with cartilage. The metacarpal bones are connected together by dorsal, palmar, and interosseous ligaments.
In the latter condition the joint between the hamate and the fourth and fifth metacarpal bones has a separate synovial membrane. The synovial cavities of these joints are prolonged for a short distance between the bases of the metacarpal bones. There is a separate synovial membrane between the pisiform and triangular.
The hamate bone has six surfaces: The superior, the apex of the wedge, is narrow, convex, smooth, and articulates with the lunate. The inferior articulates with the fourth and fifth metacarpal bones, by concave facets which are separated by a ridge. The dorsal is triangular and rough for ligamentous attachment.
fracture at the neck of the fifth metacarpal: punching solid object: Boxer's fracture at Wheeless' Textbook of Orthopaedics online Bumper fracture: Car bumper: compression fracture of lateral tibial plateau: forced valgus of knee when struck from side by car bumper: Bumper fracture at TheFreeDictionary.com: Chance fracture: George Quentin Chance
The variant of MS that fuses the 4th and 5th metacarpals is caused by X-linked recessive mutations (alterations or duplications) in the FGF16 gene, in chromosome X. [10]It is a feature of various rare disorders such as Apert's syndrome, and can occur alongside other isolated congenital hand/foot malformations including syndactyly, cleft hand, metatarsal synostosis, and polydactyly.