Cancer is a broad group of diseases characterized by uncontrolled cell growth, forming abnormal masses, and having the potential to spread to other parts of the body. This condition leads to serious health problems. There are over 200 known types of cancer. Rapidly growing cancer cells can form masses called tumors, which can disrupt the normal functions of the body.

Tumors are generally categorized into three types: benign, malignant, and precancerous (premalignant).

* Benign tumors typically do not spread to surrounding tissues and usually do not pose a life-threatening risk.
* Malignant tumors, however, tend to spread to other regions of the body, organs, or tissues (metastasize). This spread can lead to serious health issues that are life-threatening.
* Precancerous conditions (premalignant lesions) refer to the presence of abnormal cells that are not yet cancerous but have the potential to develop into cancer over time.

Lung, lymphoma, leukemia, prostate, breast, and colon cancer are among the commonly observed and potentially fatal types of cancer.