Abstract

When cells grow and divide more than they should or do not die when they should, an abnormal mass of tissue arises. Tumors can be benign (noncancerous) or malignant (cancerous). Benign can develop to be quite large, but they would not spread to healthy tissue or other sections of the body. Malignant tumors can invade or disseminate into surrounding structures.
They can also spread through the blood and lymph systems to other regions of the body. Also termed as neoplasm.. But research has shown that specific risk factors may change the person's chances of producing human. Cancer be prevented by the diagnosis of tumor. As tumor can either be benign or malignant. By proper diagnosis cancer development and probability of future occurrence of tumor can bedetected.

Key words: tumor, cancer, Markov chain, artificial neural network, Naïve Bayes.