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Proximal fractures make up 5% of all fractures and 25% of humerus fractures, [9] middle fractures about 60% of humerus fractures (12% of all fractures), [12] and distal fractures the remainder. Among proximal fractures, 80% are one-part, 10% are two-part, and the remaining 10% are three- and four-part. [ 22 ]
A supracondylar humerus fracture is a fracture of the distal humerus just above the elbow joint. The fracture is usually transverse or oblique and above the medial and lateral condyles and epicondyles. This fracture pattern is relatively rare in adults, but is the most common type of elbow fracture in children. [1]
The trochlea has the capitulum located on its lateral side and the medial epicondyle on its medial. It is directly inferior to the coronoid fossa anteriorly and to the olecranon fossa posteriorly. In humans, these two fossae, the most prominent in the humerus, are occasionally transformed into a hole, the supratrochlear foramen , [ 2 ] which is ...
The lateral supracondylar ridge is a prominent, rough margin on the lower part of the lateral border of the humerus. It presents an anterior lip for the origin of forearm extensors, including the brachioradialis muscle above, and the extensor carpi radialis longus muscle below. [ 1 ]
impacted posterior humeral head fracture occurring during anterior shoulder dislocation: Hill Sachs Lesion at Wheeless' Textbook of Orthopaedics online Holstein–Lewis fracture: Arthur Holstein Gwylim Lewis: fracture of the distal third of the humerus resulting in entrapment of the radial nerve: Holstein-Lewis fracture at Orthopedic Weblinks
In birds, where the arm is somewhat rotated compared to other tetrapods, it is termed dorsal epicondyle of the humerus. In comparative anatomy, the term ectepicondyle is sometimes used. [2] A common injury associated with the lateral epicondyle of the humerus is lateral epicondylitis also known as tennis elbow. Repetitive overuse of the forearm ...
The posterior fat pad is normally pressed in the olecranon fossa by the triceps tendon, and hence invisible on lateral radiograph of the elbow. [3] When there is a fracture of the distal humerus, or other pathology involving the elbow joint, inflammation develops around the synovial membrane forcing the fat pad out of its normal physiologic resting place.
Proximal humerus fractures account for approximately 4-7% of all fractures in adults. [11] [8] It is the most common fracture of the humerus, as well as the most common fracture at the shoulder girdle. [11] [8] They are more common in women than men, and occur more often in older adults.