Basal cell carcinoma
Basal cell carcinoma: The most common type of skin cancer, which commonly presents as a sore that seems to get better and then recurs and may start to bleed. Basal cell carcinoma often occurs on the face and neck, where the skin is exposed to sunlight. These tumors are locally invasive and tend to burrow in but not metastasize (spread) to distant locations.
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- Basal cells
Basal cells: Small, round cells found in the lower part, or base, of the epidermis, the outer layer of the skin.
- Basal ganglia
Basal ganglia: A region of the base of the brain that consists of three clusters of neurons (caudate nucleus, putamen, and globus pallidus) that are responsible for involuntary movements such as tremors, athetosis, and chorea. The basal ganglia are abnormal in a number of important neurologic conditions, including Parkinson’s disease and Huntington’s disease.
- Basal metabolic rate
Basal metabolic rate: A measure of the rate of metabolism. For example, someone with an overly active thyroid will have an elevated basal metabolic rate.
- Basal nuclei
Basal nuclei: A region located at the base of the brain composed of 4 clusters of neurons, or nerve cells. This area of the brain is responsible for body movement and coordination. The groups of neurons most prominently and consistently affected in Huntington disease — the pallidum and striatum — are located in the basal […]
- Basal temperature
Basal temperature: 1) Usually, a person’s temperature on awakening in the morning. As changes in basal temperature accompany ovulation, it is often tracked by women who wish to ensure or avoid pregnancy. 2) A crude measure of thyroid function via taking and comparing basal temperatures (also called the Broda test.)