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A proximal humerus fracture is a break of the upper part of the bone of the arm . [3] Symptoms include pain, swelling, and a decreased ability to move the shoulder . [ 1 ] Complications may include axillary nerve or axillary artery injury.
The surgical neck of the humerus is a bony constriction at the proximal end of shaft of humerus. It is situated distal to the greater tubercle and lesser tubercle , and proximal to the deltoid tuberosity .
Proximal fractures are classified into one of four types of fractures based on the displacement of the greater tubercle, the lesser tubercle, the surgical neck, and the anatomical neck, which are the four parts of the proximal humerus, with fracture displacement being defined as at least one centimeter of separation or an angulation greater ...
Scapular fracture; Arm fracture. Humerus fracture (fracture of upper arm) Supracondylar fracture; Holstein-Lewis fracture – a fracture of the distal third of the humerus resulting in entrapment of the radial nerve; Forearm fracture. Ulnar fracture. Monteggia fracture – a fracture of the proximal third of the ulna with the dislocation of the ...
Extension type of supracondylar humerus fractures typically result from a fall on to an outstretched hand, usually leading to a forced hyperextension of the elbow. The olecranon acts as a fulcrum which focuses the stress on distal humerus (supracondylar area), predisposing the distal humerus to fracture. The supracondylar area undergoes ...
Studies generally use the x-ray appearance of the arm to determine how displaced a fracture is. The definition of ‘displaced fractures' are variable, with anything from 2mm to more than 15mm; [4] however x-rays on which this assessment is made are known to be hugely misleading with fractures showing little displacement having >10mm displacement using CT scans.
An inferior dislocation of the shoulder after an automobile accident. Note how the humerus is abducted. Also present is a fracture of the greater tuberosity. Inferior dislocation is the least likely, occurring in less than 1%. This condition is also called luxatio erecta because the arm appears to be permanently held upward or behind the head. [18]
The anatomical neck divides the head of the humerus from the greater and lesser tubercles of the humerus. It gives attachment to the capsular ligament of the shoulder joint except at the upper inferior-medial aspects.