A scar is fibrous tissue made of collagen that replaces the injured skin. The following breast cancer treatments can cause scar tissue to form: surgery; radiation therapy; Scar tissue can cause its own side effects: nerve pain or numbness if scar tissue forms around nerves; A lump of scar tissue forms in the hole left after breast tissue is removed. If scar tissue forms around a stitch from surgery it's called a suture granuloma and also feels like a lump. Changes in breast appearance.
Necrotic tissue is dead tissue, which usually results from an inadequate local blood supply. Necrotic tissue contains dead cells and debris that are a consequence of the fragmentation of dying cells.Necrotic tissue changes color from red to brown or black/purple, as it becomes more dehydrated.ecrotic tissue is dead tissue, which usually results from an inadequate local blood supply. Necrotic tissue contains dead cells and debris that are a consequence of the fragmentation of dying cells.
Necrosis is the death of cells in living tissue caused by external factors such as infection, trauma, or toxins. As opposed to apoptosis, which is naturally occurring and often beneficial planned cell death, necrosis is almost always detrimental to the health of the patient and can be fatal.