Polyps are often caused by inflammation and are rarely malignant. Polyunsaturated fats tend to be more liquid than saturated fats. Prophylactic A substance or procedure that helps to prevent disease. An artificial device to replace a limb, tooth, or other body part. Proton The positively charged unit of the nuclear mass.
Protons form part of the atom's nucleus, around which negative electrons revolve.
In radiation therapy, protons and other heavy charged particles deliver the bulk of their energy at the point where they cease travelling. Conventional forms of external-beam radiation therapy do the opposite. This often means that the dose necessary to destroy a tumor cannot be given with conventional radiation therapy, since that dose can irreparably harm normal tissues overlying the tumor. Radiation therapy Treatment of disease by either radioactivity or X-rays. A medical term for either the manipulation into correct position of a dislocated joint or fractured bone, or the pushing of a hernia back into its proper place.