Glossary

E

Edema

The accumulation of fluid in a part of the body.

Efficacious (Efficacy)

The capability of producing the desired effect.

Effusion

A collection of fluid in a body cavity, usually between two adjoining tissues. For example, a pleural effusion is the collection of fluid between two layers of the pleura (the lung's covering).

Electrocardiogram (EKG or ECG)

A test that takes recordings of the electrical activity of the heart.

Electron Beam

A stream of high energy particles (electrons) which produces a treatment beam which treats tissues within a few inches the skin surface.

Endoscopy

A procedure looking at the inside of body cavities, such as the esophagus or colon.

Enzyme

A protein that acts as a catalyst, increasing the rate at which chemical change occurs in the body.

Erythema

Redness of the skin.

Erythrocyte

The red blood cells. They carry oxygen to tissue.

Esophagitis

Inflammation of the esophagus.

Estrogen

A female hormone produced primarily by the ovaries.

Estrogen receptor assay (ER assay)

A test that determines if breast cancer is stimulated by the estrogen.

Excision

Surgical removal.

External beam

Radiation therapy that uses a machine or source located outside the body to aim high energy rays at cancer cells.

Extravasation

The leaking of intravenous fluids or medications into tissue surrounding the infusion site. Extravasation may cause tissue damage.

F

False Negative Report

A negative result when in reality it is positive in nature.

False Positive Report

A positive result when in reality it is negative in nature.

Fine-needle aspiration

A procedure in which a thin needle is inserted to obtain a sample for the evaluation of suspicious tissue.

Fistula

An abnormal opening between two areas of the body.

Flutamide (Eulexin)

An anti-androgen medicine that may be prescribed with an LHRH analog or an orchietomy in combination hormonal therapy for prostate cancer.

Frozen section

A technique in which tissue is removed and then quick-frozen and pathologically examined under a microscope.

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