What is a tumor?
It is a mass of abnormal tissue that arises from normal cells, has no useful function and tends to grow.
Cell abnormalities may include increased size or number, or loss of characteristics that differentiate their tissue of origin.
tumors have a distorted size, shape and/or structure. Less differentiated cell tends to grow faster.
Malignant tumors invade tissues locally and metastasize in blood or lymph. The stronger the tendency to
the more malignant the tumor.
Tumors may not cause pain until they press on or invade nerves.
and malignant tumors can press on nearby structures, block vessels, or produce excess hormones, all of which can cause death.
Benign tumors remain as solid mass that can be removed by surgery if accessible; they can cons