What are the characteristics of a tumor?
tumour, also spelled tumor, also called neoplasm, a mass of abnormal tissue that arises without obvious cause from preexisting body cells, has no purposeful function, and is characterized by a tendency to independent and unrestrained growth.
What are the two kinds of tumors and their characteristics?
There are two general types of tumors: benign (non-cancerous) tumors and malignant (cancerous) tumors. A benign tumor is composed of cells that will not invade other unrelated tissues or organs of the body, although it may continue to grow in size abnormally.
What are the characteristic of benign tumors?
A benign neoplasm looks a lot like the tissue with normal cells from which it originated, and has a slow growth rate. Benign neoplasms do not invade surrounding tissues and they do not metastasize. Thus, characteristics include: Slow growth.
What is the purpose of a tumor?
In general, tumors occur when cells divide and grow excessively in the body. Normally, the body controls cell growth and division. New cells are created to replace older ones or to perform new functions. Cells that are damaged or no longer needed die to make room for healthy replacements.
How do you classify a tumor?
Tumors are traditionally classified four ways: (I) broadly, by tissue, organ, and system; then by (II) specific type, and (III) grade according to WHO classifications; and (IV) finally by spread according to the Tumor Node Metastasis (TNM) system.
What is special type of tumors?
They either cannot spread or grow, or they do so very slowly. If a doctor removes them, they do not generally return. Premalignant: In these tumors, the cells are not yet cancerous, but they have the potential to become malignant. Malignant: Malignant tumors are cancerous.
How does a tumor look like?
Bumps that are cancerous are typically large, hard, painless to the touch and appear spontaneously. The mass will grow in size steadily over the weeks and months. Cancerous lumps that can be felt from the outside of your body can appear in the breast, testicle, or neck, but also in the arms and legs.
What is the difference between a mass and a tumor?
The word tumor simply means a mass. Tumor is therefore a general term that can refer to benign or malignant growths. Benign tumors are non-malignant/non-cancerous tumors. A benign tumor is usually localized, and does not spread to other parts of the body.
What disease causes benign tumors?
Neurofibromatosis is a rare inherited disorder that results in benign tumors of the nerves and other parts of the body. Symptoms of this disease range from being virtually unnoticeable to causing neurologic problems or bone defects that affect the skull and spine.