A healthy cell, divides, lives on for some time and then dies off. That is the normal cycle of a cell’s life. Now, due to some mutation in the DNA of a cell, it can replicate itself through cell division incessantly and wouldn’t die that would ultimately lead to the formation of a lump or tumour. This medical condition is called cancer.
One of the most efficient ways to arrest cancer and the spread of the disease is to surgically remove the lump or tumour from the body of the patient before it could harm the same and cause irreversible damage to the patient’s vital organs thus leading to death.
Cancer surgery involves not only the removal of the tumour but also some of the healthy tissue around the tumour.
Now, one can ask why the surgeon is removing healthy tissue along with the tumour. Well, it is sort of like an insurance policy as the cancerous cells might have invaded nearby healthy tissue and is lying dormant. If it is not removed, one cancerous cell could trigger the formation of yet another tumour and ultimately, the patient will be looking at another surgery.