CHEK2: A gene on chromosome 22q that encodes a kinase enzyme and influences a person’s susceptibility to breast cancer. A variant (allele) of CHEK2 that abolishes its kinase activity results in a 2-fold increase in the risk of breast cancer for women and a 10-fold increase in risk for men.
The CHEK2 kinase is at a checkpoint in the cell cycle, is activated in response to DNA damage, and prevents the damaged cell from entering mitosis.
- Chekhov, Anton
Chekhov, Anton: (1860-1904) “Russia’s most famous physician” and greatest dramatist. Anton Pavlovich Chekhov graduated from the Medical Faculty of Moscow University in 1884 and practiced medicine throughout much of his short remaining life. In 1890 Chekhov on his own undertook a medical census of the convicts in the Sakhalin Island penal colony. During the famine […]
- Chemical menopause
Chemical menopause: Menopause induced by chemotherapy or other chemicals or medications.
- Chemical reaction
Chemical reaction: A process in which one substance is transformed into another.
- Chemical terrorism
Chemical terrorism: Terrorism using chemical agents. These chemical agents are poisonous gases, liquids or solids that have toxic effects on people, animals or plants. Most chemical agents are capable of causing serious injuries or death. The severity of injuries depends on the type and amount of the chemical agent used, and the duration of exposure. […]
Chemo: Slang for chemotherapy — drug therapy for cancer. Most anticancer drugs are given IV (into a vein) or IM (into muscle). Some anticancer agents are taken orally (by mouth). Chemotherapy is usually systemic treatment, meaning that the drugs flow through the bloodstream to nearly every part of the body. Patients who need many rounds […]