What is cancer?

Cancer is a type of disease characterised by a lawless cell growth ie cells that cannot be controled.There are many types of cancer,each is classified according to the type of cell that is affected at the beginning.When cancer cell is divided uncontrollably,it is harmful to the body.It will then form tumours except in the case of the leukemia ie blood cancer.lt's the case where cancer stops the normal blood function by dividing cells in the blood stream.Tumours can interfere with the digestive,nervours and the circulatory system in the body.There are tumors that are not dangerious.
They include the ones that stay in one spot in the body.They don't spread easily on the body example is breast cancer,the breast can be cut off and the person's life can be saved when it's found on time.it can be dangerous when cells move round the body, using the blood and when the divides and grows.when cancer cells moves around the body system,grow,attacking and destoring othe tissues that are healthy.lt's said to metastasized.This process is called metastasis.