OA has various meanings in the Health category. Discover the full forms, definitions, and usage contexts of OA in Health.
A type of malignant brain tumor that belongs to the category of "mixed" gliomas. Gliomas are brain tumors that begin in glial, or supportive, cells in the brain or spinal cord. Malignant gliomas are the most common primary tumors of the central nervous system (the brain and spinal cord). Mixed gliomas are gliomas that contain more than one type of cell. An oligoastrocytoma is a mixed glioma composed of cells that resemble two different kinds of brain cells known as astrocytes and oligodendrocytes.
HealthOsteoarthritis (OA) is a type of joint disease that results from breakdown of joint cartilage and underlying bone. The most common symptoms are joint pain and stiffness. Initially, symptoms may occur only following exercise, but over time may become constant. Other symptoms may include joint swelling, decreased range of motion, and when the back is affected weakness or numbness of the arms and legs.
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