organ non-tumorous lesion measurement kidney lesion measurement kidney non-tumorous lesion measurement 2012-10-08T03:01:39Z JSmith Measurement of a lesion in the kidney, he organ which functions to maintain proper water and electrolyte balance, regulate acid-base concentration, and filter the blood of metabolic wastes, which is not neoplastic in origin. A lesion is a localized pathological change in structure of an organ or tissue due to injury or disease; especially one that is circumscribed and well defined. Examples of non-tumorous lesions would include wounds, sores, ulcers, infarctions, etc.