humerus

Humeral Bone (Upper Arms) Deficiency

Introduction Humeral head defects are commonly present in patients with shoulder instability. The defects are usually small and carry the eponym Hill-Sachs lesion when secondary to anterior instability and reverse Hill-Sachs lesions when secondary to posterior instability. Although quite ubiquitous in recurrent anterior shoulder instability, the management of large Hill-Sachs defects remains controversial especially in …

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Tear & Inflammation of the Deltoid Muscle (Treatment in Singapore)

Tears of the deltoid muscle, though infrequent, do occur in team handball and volleyball players, American footballers, weightlifters, wrestlers, and other athletes. The muscle is damaged in most cases by direct impact, but it can also be injured by overuse. The tear affects only a small part of the muscle, making it difficult to raise …

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Biomechanics of Shoulder Stability (Static Stability Factor)

The glenohumeral (shoulder) joint is inherently unstable, with the large humeral head articulating with the small and shallow glenoid. Static stability is provided by the orientation of the articular surfaces, the articular conformity of humerus and the glenoid, the glenoid labrum, the negative intra-articular pressure, the adhesion-cohesion of synovial joint fluid, and the glenohumeral joint …

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Unicameral Bone Cyst

Basics Description A benign membrane-lined, fluid-filled lesion of bone that develops in childhood and fills in by maturity Location: 80% occur in the proximal humerus and proximal femur. Other, less common, areas are the proximal tibia, distal tibia, distal femur, calcaneus, distal humerus, radius, fibula, ilium, ulna, and rib. Usually centrally located adjacent to the …

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Achondroplasia

Basics Description Achondroplasia is the most common skeletal dysplasia. Characteristics: Patient height <4.5 feet at maturity The greatest shortening occurs in the proximal humerus and femur . Hypoplasia of the midface and frontal bossing may be present. Arthritis is rarely seen, but spinal stenosis is the most serious possible complication. Affects the skeletal and neurologic …

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