A fascia (; pl.: fasciae or fascias; adjective fascial; from Latin band) is a generic term for macroscopic membranous bodily structures.: 42  Fasciae are classified as superficial, visceral or deep, and further designated according to their anatomical location. The knowledge of fascial structures is essential in surgery, as they create borders for infectious processes (for example Psoas abscess) and haematoma. An increase in pressure may result in a compartment syndrome, where a prompt fasciotomy may be necessary...