Why the designation CANCER is one and only given for overgrowth of cell?

Why the designation CANCER is one and only given for overgrowth of cell?
The creature CANCER has abundant legs and it moves side words and also penetrate surrounded by sand very promptly. Similarly the the cells artificial by disease CANCER also spreads very brisk both side words and also by penetrate. Spreading or overgrowth of Cancer cell resembles movement of the creature Cancer. So the name Cancer is given-
The dub CANCER is an overall term applied to over 200 different diseases. These diseases respectively affect a specific cell that for unknown reasons mutates and begin to grow uncontrollably. Cancer can invade local tissue, increase, and has the proficiency to shed hundreds of maligant microscopic cells into the blood stream and lymphatic system. Through this avenue cancer metastasizes and a brand modern tumor can grow in a distant location from the imaginative tumor. These satellite tumors can also metastasize and send out hundreds of microscopic cancer cell . . and so it becomes a vicous cycle that if departed untreated is fatal.
If you are speaking almost why the word is used to describe the overgrowth of cells, it is credited to Aulus Cornelius Celsus sometime between 25 BC - 50 who used the word to describe what the tumor looked approaching . . a crab. Hippocrates also uses the word cancer to describe what a tumor looked like when it be sliced open - he described a roundish solid center surrounded by long and pointy projections that somewhat resembled a crab.
ACS: The history of cancer
http://www.cancer.org/docroot/cri/conten...
uncontrolled , overgrowth of MUTATED cell.go read cabout telomeres & telomerase, its reasonably the explanation/story.