Skip Navigation
Genetics Home Reference: your guide to understanding genetic conditions About   Site Map   Contact Us
 
Home A service of the U.S. National Library of Medicine®
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

Lesion

Definition(s)

An area of abnormal tissue. A lesion may be benign (noncancerous) or malignant (cancerous).

Definition from:  National Cancer Institute dictionaryThis link leads to a site outside Genetics Home Reference.

An abnormal change in structure of an organ or part due to injury or disease ; especially : one that is circumscribed and well defined.

Definition from: Merriam-Webster's Medical DictionaryThis link leads to a site outside Genetics Home Reference. by Merriam-Webster Inc.

See also Understanding Medical Terminology.

 
Published: September 15, 2014