Polycystic kidney disease (PKD) is a genetic disorder characterized by the growth of numerous cysts in the kidneys. The kidneys are two organs, each about the size of a fist, located in the upper part of a person's abdomen, toward the back. The kidneys filter wastes and extra fluid from the blood to form urine.
diagnostic (comparative more diagnostic, superlative most diagnostic) 1  of, or relating to diagnosis. 2  characteristic of a particular disease.
diagnostic test. tests likely to provide information which aids in the making of a diagnosis. diagnostic trail. a standard procedure for making a clinical and laboratory examination so that nothing is omitted and so that the procedure can be checked or repeated.resent in most countries to provide veterinary laboratory diagnostic services, particularly with respect to regulatory diseases but, in almost all cases, also for laboratory diagnostic support for any animal disease.