What would you do in this situation regarding your family doctor?

Four years ago, a relative of mine went to see his family doctor for a physical. Unbeknownst to him, his urine test revealed the presence of protein, which indicated problems with his kidneys. However, his doctor did not disclose this finding to him at the time. Last week, my relative suddenly became ill with chronic kidney disease. He was rushed to hospital, and a new doctor there asked him why he waited so long to seek help, since records showed that there was already a problem with his urine four years ago. My relative said his family doctor never told him about the results of his test at that time. What would you do in this situation, if you were my relative?