Changes

A '''tumor''' is an abnormal and functionless mass of [[tissue]] within a living body that is not inflammatory and arises from pre-existent tissue. This can either be benign (non-cancer) or malignant ([[cancer]]).  Malignant tumors (cancer) are more invasive and can spread ([[metastasis|metastasize]]) to other parts of the body.  According to the National Center for Health Statistics, cancer was (as of 2004) the second leading cause of death in the United States.<ref>{{cite web|url=http://www.cdc.gov/nchs/fastats/lcod.htm|title=NCHS FASTATS}}</ref>  However, internally even benign tumors can cause harm, for example, by occupying space or exerting pressure on adjacent organs or tissues.

A '''tumor''' is an abnormal and functionless mass of [[tissue]] within a living body that is not inflammatory and arises from pre-existent tissue. This can either be benign (non-cancer) or malignant ([[cancer]]).  Malignant tumors (cancer) are more invasive and can spread ([[metastasis|metastasize]]) to other parts of the body.  According to the National Center for Health Statistics, cancer was (as of 2004) the second leading cause of death in the United States.<ref>{{cite web|url=http://www.cdc.gov/nchs/fastats/lcod.htm|title=NCHS FASTATS}}</ref>  Inside the body, even benign tumors can cause harm, for example, by occupying space or exerting pressure on adjacent organs or tissues.

[[Category:Medicine]]

[[Category:Medicine]]