What are Tumors?
When healthy cells begin to proliferate at an abnormal rate, they will in some cases stick together. This mass of cells forms what is known as a tumor. Although the word tumor is often associated with cancer, the reality is that not all tumors are cancer. To understand the difference, an explication of benign and malignant tumors is warranted. Defining benign tumors, it has been noted that these tumors are not invasive, do not spread to other parts of the body and do not cause damage to tissue and organs. Once they are removed they do not typically return.
Malignant tumors, on the other hand, are invasive and can cause tissue damage. Cells from these types of tumors generally invade the bloodstream, or metastasize, and spread the cancer to other areas and organs in the body. Malignant tumors can be removed from the body however, the potency of these tumors means that in many cases they will return. There are a number of malignant tumors that can form. Carcinomas are a form of malignant tumor that develops in tissues covering organs of the body. These include the skin, uterus, lung and breast. Malignant tumors of the soft tissue are considered to be sarcomas. Soft tissue includes all of the tissue in the body that supports or surrounds organs including muscles, tendons, blood vessels and nerves.