Cancer

Cancer is a group of diseases characterized by uncontrolled growth of tissue cells in the body and the invasion by these cells into nearby tissue and migration to distant sites. Cells are the building blocks of living things.
Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn't need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die.
There are many different kinds of cancers. Cancer can develop in almost any organ or tissue, such as the lung, colon, breast, skin, bones, or nerve tissue.

Adenocarcinoma

Adenocarcinoma is a type of cancer that may affect various organs. Adenocarcinoma is a cancer originating in glandular tissue. The tissues affected are part of a larger tissue category known as epithelial. Epithelial tissues line skin, glands, cavities of organs etc. This epithelium comes from the ectoderm, endoderm and mesoderm in the fetus. Adenocarcinoma cells do not necessarily need to be part of a gland but may possess secretory properties.