A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Palliative care seeks to relieve the symptoms of cancer and to help people live more comfortably, rather than treat the cancer itself.

Passive exercise is the manipulation of your limbs by a physical therapist to improve flexibility and circulation, especially if you are confined to bed.

Pathogens are viruses, bacteria, or other disease-causing microorganisms.

Photodynamic therapy is a treatment in which non-toxic chemicals are injected into the blood stream to make cancer cells photosensitive, or lightsensitive. The tumor is then exposed to a particular wavelength of light that interacts with the photosensitizer, destroying cancerous cells. Primary therapy is the main course of conventional treatment in a person's cancer care, such as surgery, radiation, or chemotherapy.

Primary tumor is the original site of cancer in the body.

Prognosis is a doctor's prediction of the expected course and outcome of an illness, based on the available medical data for people with a similar diagnosis.

Progression is the spread of cancer or increase in tumor size. If cancer comes back within a year after treatment ends, it's often a progression rather than a recurrence.

Prostate specific antigen (PSA) is a protein created by the prostate gland that can be used to detect prostate cancer.

Proton therapy is an external radiation treatment that uses protons, or positively charged particles extracted from hydrogen atoms, to deliver an extremely powerful but precise dose of radiation to the tumor. Because protons tend to scatter less than other particles, the proton beams can be focused tightly on the tumor with virtually no impact on surrounding tissue.

Psychologist is an expert in the human mind and behavior. Clinical psychologists provide psychotherapy and counseling in an individual or group setting, and generally need a PhD or PsyD to practice.

Psychiatrist is a medical doctor who specializes in diagnosing and treating mental disorders, including depression and anxiety. Psychiatrists use psychotherapy, counseling, psychiatric medications, and other techniques to treat the people in their care.

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