This cells produces millions, and eventually billions, of copies of itself. These clones fail to function as normal esophagus tissue, but instead divert resources from healthy cells to fuel their own growth. It is this ability to spread that makes cancer so dangerous. Patients rarely succumb to the growing tumors themselves. We also see interference with normal organ functioning, and a general debility arising from malnutrition, dehydration, and multiple metabolic disturbances.
Every cancer initially arises from somewhere.
An example is a bone tumor extending into the muscle and fat surrounding the bone. They purify the plasma, killing bacteria and trapping cancer cells. These areas are those that have good blood supply and complex loose fibrous networks that trap cells, such as the lungs, liver, bones, brain and skin. On the other hand, sometimes the origin may be very perplexing and nearly impossible to discern, such as when a single lump of non-skin cancer arises on the torso, and could have arisen from any number of inapparent areas. The origin of a cancer may be inapparent for several reasons.