Here's what I found a while back when seeking info about tumor necrosis. 1) Necrosis in the tumor means that the cancer cells in that area are dead. The pathologic finding of necrosis suggests a fast-growing cancer. This often happens because the tumor runs out of blood supply in the central portion. Without a blood supply, the tumor cells cannot live.
In association football, where the shoes themselves are known as football boots, there are three different cleat types. There are soft ground cleats which are made for wet weather. The soft ground cleats are always replaceable, and are almost always metal, so when they wear down they are easy to replace.
The major difference between soccer and baseball shoes is the pattern of the cleats on the bottom. On soccer cleats you will notice there is never a single cleat at the very front tip. The reason there is not single cleat at the front is because it can easily cause injury to an opposing player's shin.