Mesothelioma Medical Terms Covering Cancer, Mesothelioma Treatment, and Diagnosis

Mesothelioma Resources

Glossary of Mesothelioma Medical Terms

This glossary of medical terms is specifically geared for patients with mesothelioma and their families. Select a from the letters or scroll below:

A B C–F G–H I L M–N O P–Q R–Z

A

adjuvant therapy:

Treatment used in addition to the main medical treatment. It usually refers to chemotherapy or radiation added after surgery.

advanced cancer:

A general term describing stages of cancer in which the disease has spread from the primary site to other parts of the body.

AJCC Staging System:

American Joint Committee on Cancer staging system (also called the TNM system), which describes the extent of a cancer’s spread in Roman numerals from 0 through IV.

ascites:

Accumulation of fluid in the abdominal cavity.

B

biopsy:

The removal of a sample of tissue to see whether cancer cells are present.

C–E

carcinogen:

Any substance that causes cancer or helps cancer grow.

chemotherapy:

Treatment with drugs to destroy cancer cells. Chemotherapy is often used with surgery or radiation to treat cancer when the cancer has spread or when it has recurred.

curative treatment:

Treatment aimed at producing a cure. Compare with palliative treatment.

complementary therapy:

Therapies used in addition to standard therapy. Some complementary therapies may help relieve certain symptoms of cancer, relieve side effects of standard cancer therapy, or improve a patient’s sense of well–being.

computed tomography (CT scan):

Special radiographic technique that uses a computer to combine multiple x–ray images into a two dimensional cross–sectional image.

CT scan:

See computed tomography.

cytokines:

Proteins which occur naturally in the human body, and which are similar to hormones. They act as intercellular mediators and differ from classical hormones in that they are produced by a number of tissue or cell types rather than by specialized glands. They may stimulate immunity and inhibit some cancers.

G–H

gene:

A segment of DNA that contains information on hereditary characteristics such as hair color, eye color, and height, as well as susceptibility to certain diseases.

gene therapy:

A new type of treatment in which defective genes are replaced with normal ones. The new genes are delivered into the cells by viruses or proteins.

I

imaging:

Method used to produce a picture of internal body structures. Some imaging methods used to detect cancer are x–rays, CT scans, and magnetic resonance imaging (MRI).

immunotherapy:

Treatment of diseases such as cancer by stimulating the body’s own immune system.

interferon:

A type of cytokine protein produced by cells. Interferon helps regulate the body’s immune system

interleukin:

A group of polypeptides that are members of the family of cytokines which affect functions of specific cell types and are found in small quantities. They are secreted regulatory proteins produced by lymphocytes and other cell types.

L

latency period:

Time from exposure to a substance to the onset of a disease. Example: time from asbestos exposure to development of mesothelioma.

M–N

magnetic resonance imaging (MRI):

A scan that uses magnetic fields, radio waves, and a computer to create images of selected areas of the body.

mesothelioma:

Malignant tumor of the mesothelium, usually of the lung, generally caused by exposure to asbestos fibers.

mesothelium:

Tissue formed by specialized cells lining the chest, abdominal cavities, and the outer surface of most internal organs. Mesothelium helps protect the organs by producing a lubricating fluid that allows the organs to move.

MRI:

See magnetic resonance imaging

O

oncologist:

A doctor with special training in the diagnosis and treatment of cancer.

oncology:

The branch of medicine concerned with the diagnosis and treatment of cancer.

P–Q

palliative treatment:

Therapy that relieves symptoms, such as pain or blockage, but is not expected to cure the cancer. Its main purpose is to improve the patient’s quality of life.

PDT:

See photodynamic therapy.

peritoneal mesothelioma:

Cancer of the lining of the abdomen.

PET scan:

See positron emission tomography.

photodynamic therapy (PDT):

Cancer treatment that uses the interaction between laser light and a substance that makes cells more sensitive to light. When light is applied to cells that have been treated with this substance, a chemical reaction occurs and destroys cancer cells.

pleura:

The membrane lining the lungs and chest cavity.

pleura effusion:

Accumulation of fluid in the lungs.

pleural mesothelioma:

Cancer of the pleura, or the membrane that lines the lungs and chest cavity.

positron emission tomography (PET):

A PET scan creates an image of the body (or of biochemical events) after the injection of a very low dose of a radioactive form of a substance such as glucose (sugar). The scan computes the rate at which the tumor is using the sugar. In general, high–grade tumors use more sugar than normal and low–grade tumors use less.

R–Z

radiation therapy (radiotherapy):

Treatment with high–energy rays such as x–rays to kill or shrink cancer cells.

radiotherapy:

See radiation therapy.

risk factor:

Anything that increases a person’s chance of getting a disease such as cancer. Different cancers have different risk factors

S–Z

staging:

the process of finding out whether cancer has spread and if so, how far.

SV40:

A virus found in monkeys that may be linked to human mesothelioma and other cancers. The virus was found as a contaminate of polio vaccines in the United States in the 1950’s and early 1960’s.

T–cells:

White blood cells made in the thymus gland. They play a large role in the immune response against transplanted organs and tissues, and cancer cells.

thoracoscopy:

A surgical technique for tissue sampling in which a telescopic instrument (thoracoscope) fitted with a lighting system is inserted through a puncture in the chest wall. The physician can see the tumor and sample it using a forceps–like tool.

For more medical terms, see CancerWeb On–line Medical Dictionary.