Mass of nerve fibers following the amputation of a limb is called?

The mass of nerve fibers following the amputation of a limb is called a "neuroma." A neuroma can form at the site where the nerve has been cut, leading to the growth of a tangled mass of nerve tissue. This can result in pain or sensations in the area, often referred to as phantom limb sensations. Neuromas are a common complication of limb amputations.