nephrosis

This term is used exclusively in medical and clinical contexts to describe a specific pathological state of the kidneys. It is distinguished from nephritis by the absence of inflammation; while nephritis involves an inflammatory response, nephrosis refers to the degenerative changes in the renal tubules and the resulting protein loss.

As a clinical diagnosis, it is typically treated as an uncountable noun because it refers to a disease state or a pathological condition rather than a discrete object. It is rarely pluralized in professional medical literature.