Sclerosis is characterised by the hardening of the tissues of the nervous system due to the inflammation of diseases. Multiple sclerosis, which is abbreviated as MS, is defined as the condition of sclerosis in which the body replaces the quantity of myelin which is lost around the CNS nerve cells with scar tissue.
The inflammation which causes the hardening of the soft tissues of the nerve tissues is usually chronic. The word sclerosis is derived from the Greek word skleros, which means hard. Other causes which result in sclerosis include the deposit of mineral salts and the infiltration of connective tissue fibres.