Glaucoma, risk factors
5 times more likely to occur in Blacks than in Whites and about 4 times more likely to cause blindness in Blacks than in Whites).
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- Glaucoma, symptoms of
There are no symptoms of the most common form until the condition is far advanced. There is no pain except in the acute form. A person with advanced glaucoma may notice the side vision gradually failing. That is, objects in front may still be seen clearly, but objects to the side may be missed. As […]
- Gleason score
A grading system for prostate carcinoma devised by Dr. Donald Gleason in 1977 as a method for predicting the behavior of prostate cancer. Tumors with a low Gleason score are less likely to show aggressive behavior and therefore are less likely to have spread outside of the gland to lymph nodes (metastases). Gleason’s original data […]
- Glenn shunt
A surgical operation for children born with cyanotic heart disease (“blue babies”), in which a large vein (the superior vena cava) is anastomosed (connected) to the right pulmonary artery so that blood bypasses the malformed right chambers of the heart and is shunted directly into the lungs to be oxygenated. The operation was created by […]
- Glenoid labrum
A ring of fibrocartilage that runs around the cavity of the scapula (wingbone) in which the head of the humerus (the bone in the upper arm) fits. The labrum deepens this cavity (the glenoid cavity) and effectively increases the surface of the shoulder joint. Injuries to the glenoid labrum can occur from chronic trauma due […]
- Glial cell
A supportive cell in the central nervous system. Unlike neurons, glial cells do not conduct electrical impulses. The glial cells surround neurons and provide support for and insulation between them. Glial cells are the most abundant cell types in the central nervous system. Types of glial cells include oligodendrocytes, astrocytes, ependymal cells, Schwann cells, microglia, […]