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Hemiarthroplasty
Hemiarthroplasty Partial joint replacement - in the knee for example.
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Joint
Where the ends of two or more bones meet.
Knee
The complex hinge joint of the upper and lower leg involving the femur, tibia and patella.
SIMILAR TERMS--------------------------------------
Hemianopia
A loss of one-half of the field of vision; for example, all of the right side of vision is gone. This is sometimes seen in older people with vascular problems, in certain types of brain tumors or after head trauma.
Hemianopsia
Loss of one half of the field of vision (the area that can be seen by each eye when staring straight ahead).
Hemineglect
A condition following damage to the parietal stream of one hemisphere in which individuals are unaware of stimuli from the hemifield that projects to that hemisphere.
Hemiparesis
Muscle weakness of one side of the body.
Hemiplegia
Paralysis of one side of the body as a result of injury to neurons carrying signals to muscles from the motor areas of the brain.
Hemisphere
As applied to the brain, either its left or its right half.
PREVIOUS AND NEXT TERMS--------------------------------------
Hallux rigidus
Osteoarthritis causing a stiff big toe.
Hallux valgus
Devation of the big toe towards the out side of the foot. Osteoarthritis is one cause.
HSC disease
Hand-Schuller-Christian disease. A form of Histiocytosis-X.
Heat shock proteins
Produced in response to physiological stress. Of interest in inflammatory arthritis because antigenic.
Heberden's nodes
Bony swellings on distal interphalangeal joints (at the ends of the fingers) in osteoarthritis.
Hemiarthroplasty
Henoch-Schoenlein purpura
Anaphylactoid purpura. A form of allergic vasculitis. The features are arthritis, rash, gastrointestinal involvement and nephritis. Commoner in children.
Histiocytosis-X
Includes eosinophilic granuloma, Hand-Schuller-Christian disease and Letterer-Siwe disease.
HLA antigens
Human Leukocyte Antigens. (Histocompatibility antigens.) Detected by blood testing. An individual inherits a combination of HLA antigens from his or her parents. They are related to the working of the immune system. For instance, organ donors and recipients must have compatible HLA antigens, otherwise the transplanted organ is recognised as 'foreign'. Certain HLA antigens confer susceptibility to certain diseases and this explains the heritability of some diseases.
HLA B27
The histocompatibility antigen which is strongly associated with ankylosing spondylitis and other seronegative spondylarthritides. It occurs in 10% of the population and is detected using a blood test.
HLA DR4
HLA antigen associated with rheumatoid arthritis. The association is not as strong as in the case of HLA B27 and ankylosing spondylitis.
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