While assessing for costovertebral angle tenderness, a nurse percusses the area, and the client complains of sharp pain. The nurse interprets this finding as most indicative of which disorder?

When assessing for costovertebral angle tenderness, sharp pain on percussion of the area indicates inflammation of the kidney or paranephric area. The correct technique involves placing one hand over the 12th rib, at the costovertebral angle, and thumping that hand with the ulnar edge of the other fist. The client normally feels a thud and should not experience pain. Ovarian infection, liver enlargement, or spleen enlargement are not associated with the costovertebral angle tenderness. Therefore, the correct answer is kidney inflammation.