Lichen simplex chronicus (LSC) is also known as neurodermatitis. This term refers to a chronic itchy condition of the skin that appears to get worse with scratching. This scratching leads to the skin becoming leathery and thick. LSC is not contagious and it is a fairly benign disorder.
The term leukaemia is used to describe a group of malignant diseases of the haematopoietic system, in which precursors of the white blood cells (leucocytes) proliferate uncontrollably.