U.S. doctors online nowAsk doctors free
A 28-year-old member asked:

Can radiation therapy increase cell growth?

2 doctor answers6 doctors weighed in
Dr. Bahman Daneshfar
Radiation Oncology 35 years experience
No and Yes: Radiation therapy slows or stops cell growth. The goal is of course to kill cancer cells and they don't grow and die. However if you look up the four r's of radiation biology. The last one is repoplulation in which during fractionated radiation cells increase growth to repopulate. Luckily we see this more often in the good cells but unfortunately in some cases resistant cancer cells.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Andrew Turrisi
Radiation Oncology 49 years experience
No: Radiation acts on a cellular level to break single or double strands of dna, and most cells have repair enzymes to repair the damage, but double strand breaks are more lethal. Cell cycle is controlled by complex molecular paths, but cells are most susceptiple to dying as the chromosomes thicken during metaphase, and most resistant during synthesis/transciption. No way for increased cell growth.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Dec 17, 2014


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.