The esophagus is the tube that extends from the mouth to the stomach. Damage to esophageal cells causes the formation of a malignant tumor and is defined as esophageal cancer. In recent years, cases of esophageal cancer have begun to increase.

Malignant melanoma is defined as malignant melanocyte damage. Melanocytes are responsible for the production of melanin in our body.

Acute lymphocytic leukemia is a form of cancer of the blood or bone marrow characterized by a rapid increase in the number of immature white blood cells. The large number of these cells renders the marrow unable to produce healthy red blood cells.