1. Home
  2. Health
  3. Cancer

Tumor

By , About.com Guide

Created: October 05, 2009

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

Definition: A tumor is an abnormal growth or mass of tissue formed by the uncontrolled multiplication of cells. This broad term encompasses both malignant and benign growths that can develop in various tissues in the body.
Pronunciation: too-mer
Also Known As: neoplasm, mass
Examples: The patient's brain tumor requires immediate surgery.
Explore Cancer
About.com Special Features

8 Ways to Cut Drug Costs

Learn how to save money on medications with these recommendations. More >

Healthy Bodies, Healthy Minds

Keep yourself, and your family, happy and healthy this season. More >

We comply with the HONcode standard for trustworthy health information: verify here.
  1. Home
  2. Health
  3. Cancer
  4. Cancer Basics
  5. Cancer Glossary
  6. Tumor Definition - What is a Tumor

©2010 About.com, a part of The New York Times Company.

All rights reserved.