Malignant tumors is called cancer. Cancer has the potential to invade and destroy adjacent tissues and create metastases. Benign tumors do not attack adjacent tissue and does not spread the seed metastases, but may locally grow to be big. They usually do not come back after surgical removal.
Tumors (derived from the Latin tumere, which means "swelling"), is one of the five characteristics of inflammation. However, this term is now used to describe the growth of biological tissue is not normal.
Various kinds of tumors:
# Mesenchymal origin tumors
# Origin of epithelial tumors
# Germ cell tumors
# Tumor blood cells