Tumors can be benign or malignant. Tumors that stay in one spot and demonstrate limited growth are generally considered to be benign. Malignant cells are much “nimbler” than non-malignant ones. Malignant cells can pass more easily through smaller gaps, as well as applying a much greater force on their environment compared to other cells. Cells from malignant tumors can invade nearby tissues. They can also break away and spread to other parts of the body. Tumors can grow and interfere with the digestive, nervous, and circulatory system, and they can release hormones that alter body function. https://www.creative-biolabs.com/drug-discovery/diagnostics/cancer.htm
