Changes

==Treatment of cancer==

==Treatment of cancer==

===Chemotherapy===

===chemotherapy===

[[Chemotherapy]] is the use of drugs that kill [[tumor]] cells.  Conventionally, the drugs that are used are those that target cells which are rapidly undergoing [[mitosis]]; this approach is effective but is limited by side effects, which occur because these drugs have an adverse effect on normal tissues that contain rapidly-dividing cells.  Research is under way to find drugs with a wider [[therapeutic margin]].  One approach is to study specific molecular markers that may be used to identify cancer cells, and to develop drugs that preferentially kill cells that exhibit those markers.

[[Chemotherapy]] is the use of drugs that kill [[tumor]] cells.  Conventionally, the drugs that are used are those that target cells which are rapidly undergoing [[mitosis]]; this approach is effective but is limited by side effects, which occur because these drugs have an adverse effect on normal tissues that contain rapidly-dividing cells.  Research is under way to find drugs with a wider [[therapeutic margin]].  One approach is to study specific molecular markers that may be used to identify cancer cells, and to develop drugs that preferentially kill cells that exhibit those markers.

===radiation therapy===

===radiation therapy===

===surgery===

===surgery===