tumor Definition

an abnormal benign or malignant new growth of tissue that possesses no physiological function and arises from uncontrolled usually rapid cellular proliferation —called also neoplasm

a swollen or distended part

a protein that is produced chiefly by monocytes and macrophages in response especially to endotoxins and that mediates inflammation and induces the destruction of some tumor cells and the activation of white blood cells

any of a class of genes (such as p53) that act in normal cells to inhibit unrestrained cell division and that when inactivated (as by mutation) place the cell at increased risk for malignant proliferation

a malignant tumor of the kidney that primarily affects children and is made up of embryonic elements