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.
Acute tubular necrosis (ATN) is the death of tubular cells, which may result when tubular cells do not get enough oxygen (ischemic ATN) or when they have been exposed to a toxic drug or molecule (nephrotoxic ATN). Fortunately, new tubular cells usually replace those that have died.