Medical Definition of NEPHRECTOMY. : the surgical removal of a kidney.â neÂ·phrecÂ·toÂ·mize \-ËmÄ«z\ transitive verb.edical Definition of NEPHRECTOMY. : the surgical removal of a kidney.
Scleritis is an uncommon disease and is differentiated from episcleritis, which is a more common ocular condition. In episcleritis, only the superficial tissue between the white of the eye (sclera) and the blood vessel-filled covering (conjunctiva) is inflamed. Scleritis is an inflammation of the white of the eye. 2  It is serious eye disease which is often associated with underlying autoimmune disorders. 3  Prompt diagnosis and treatment is essential in preventing permanent vision loss.
Scleritis can be anterior, with involvement of the sclera that is visible to the naked eye, or posterior, with involvement of sclera that is enclosed by the orbital tissues. Anterior scleritis is further subdivided into diffuse, nodular or necrotizing types. Necrotizing anterior scleritis can occur with or without inflammation; when not associated with clinically visible inflammation, necrotizing anterior scleritis is referred to as scleromalacia perforans.