Congenital radial head dislocation

Introduction to congenital dislocation of the humeral head Congenital dislocation of the humeral head is rare, mainly due to the congenital fusion of the proximal ulna and the pronation of the forearm at a certain angle. Bilateral involvement accounted for 60%, and there was no difference in the incidence of male and female. basic knowledge The proportion of illness: 0.001% Susceptible people: no specific population Mode of infection: non-infectious Complications: congenital multiple joint contracture

Congenital humeral head dislocation

Cause:

The cause of the disease remains unclear, and the direction of dislocation of the humeral head can be forward, backward or outward. However, this disease is dominantly inherited in some patients. During the embryonic development, the ulnar bones are derived from the mesoderm. When the embryo is at the 5th week, there is no separation between the cartilage of the ulnar and ulna and the ossification or ulna. When the mesoderm tissue is filled, the ulnar and ulnar fusion occurs, and the type II humeral head dislocation occurs in the late fetus.

Congenital humeral head dislocation prevention

The disease is a congenital disease, no effective preventive measures, early diagnosis and early treatment is the key to the prevention and treatment of this disease.

In addition, it should be noted that due to the low incidence of congenital humeral head dislocation, there is no obvious dysfunction in the early stage, it is not easy to diagnose early and delay treatment, until the treatment of obvious joint dysfunction and ulnar deformation is difficult, the effect is poor, so if the clinician If there is a suspicious symptom, a differential diagnosis should be actively given.

Congenital humeral head dislocation complications Complications congenital multiple joint contracture

Congenital dislocation of the humeral head is a rare form of deformity. It can exist alone. It can also coexist with multiple joint contractures and ulnar and ulnar bones. It can mainly cause constriction of the forearm, and the elbow joint can not be straightened. Other complications are rare.

Congenital dislocation of the head of the humerus common symptoms Common humeral head dysplasia elbow joint can not flex the elbow dislocation

The main manifestations of this disease are bilateral elbow asymmetry. Sometimes there is a ringing or movement limitation when stretching or flexing the elbow joint. The direction of the ulnar bending is related to the type of dislocation. For example, the anterior dislocation of the humerus head, the ulna is convex to the front; When the head is dislocated, the ulna protrudes backward; when the lateral dislocation, the ulna protrudes to the outside. When the humerus is dislocated, the flexion range of the elbow becomes smaller, and the humeral head of the elbow can be dislocated and dislocated. When the humerus is dislocated, the elbow joint can not be fully extended. The elbow can be squatted and the protruding humeral head is small. The X-ray film shows that the longitudinal axis of the humerus on the lateral part of the elbow does not cross the humeral head. The humeral head is round. The top shape, the humeral neck and the small head of the humerus form a joint, and the contact site may be indented.

Congenital humeral head dislocation examination

There is no history of trauma in this disease. The elbow can be paralyzed and dislocated. The auxiliary examination method is mainly X-ray examination.

The X-ray film showed that the longitudinal axis of the humerus on the lateral part of the elbow joint did not cross the humeral head, and the humeral head was dome-shaped. The humeral neck and the humeral head formed joints, and the contact site could be pressed.

Diagnosis and diagnosis of congenital humeral head dislocation

The disease needs to be differentiated from traumatic humeral head dislocation. Common Monteggia fractures, humeral neck fractures, pulling elbows and other parts of the injury cause traumatic humeral head dislocation. Ulnar bending is not a proprietary feature of congenital humeral head dislocation. Can occur in the unreset traumatic humeral head dislocation, congenital humeral head dislocation, humeral head development is small, the humeral head is oval, and the soft tissue around the humeral head has ossification suggesting unreset trauma Dislocation of the humeral head.

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