In the context of tumors, a tumor is called benign if it does not spread from its site of origin.
1. Benign tumors are non-cancerous growths that do not invade nearby tissues or spread to other parts of the body. This means they stay localized at the site where they first developed.
2. In contrast, malignant tumors are cancerous and can invade surrounding tissues and spread to other areas of the body, a process known as metastasis. Metastasis is a characteristic feature of malignant tumors.
3. Therefore, when a tumor is described as benign, it means that it is not harmful in the way that it does not spread to other parts of the body. This distinction is important in determining the nature of a tumor and guiding treatment decisions.
In summary, a tumor is called benign if it does not spread from its original location.