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In biology, describes the processes by which immature cells become mature cells with specific functions. In cancer, this describes how much or how little tumor tissue looks like the normal tissue it came from. Well-differentiated cancer cells look more like normal cells and tend to grow and spread more slowly than poorly differentiated or undifferentiated cancer cells. Differentiation is used in tumor grading systems, which are different for each type of cancer.
Widely spread; not localized or confined.
A type of central nervous system tumor that forms from glial (supportive) tissue of the brain and spinal cord. Diffuse intrinsic pontine glioma usually occurs in children. It forms in the brain stem.
The process of breaking down food into substances the body can use for energy, tissue growth, and repair.
The organs that take in food and turn it into products that the body can use to stay healthy. Waste products the body cannot use leave the body through bowel movements. The digestive system includes the salivary glands, mouth, esophagus, stomach, liver, pancreas, gallbladder, small and large intestines, and rectum.
The organs that food and liquids travel through when they are swallowed, digested, absorbed, and leave the body as feces. These organs include the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus. The digestive tract is part of the digestive system. Also called alimentary tract and gastrointestinal tract.
To widen or enlarge an opening or hollow structure beyond its usual size, such as the pupil of the eye or a blood vessel.
To make something thinner, weaker, less concentrated, or less pure by adding something to it.
In medicine, a fluid that comes out of the body. Discharge can be normal or a sign of disease. Discharge also means release of a patient from care.
A condition that prevents the body from working normally.
