Cancer

Definition

Cancer is a group of diseases characterized by uncontrolled growth and spread of abnormal cells. There are over 100 types of cancer, including breast cancer, skin cancer, lung cancer, colon cancer, prostate cancer, and lymphoma.

Related terms

Tumor: An abnormal mass of tissue that results when cells divide more than they should or do not die when they should.

Metastasis: The process by which cancer spreads from place where it first started to other parts in body.

Oncology: The study and treatment of tumors.