<prompt> Renal papillary necrosis is almost associated with the following conditionDiabetes mellitusanalgesicnephroathyChronic pyelonephritisPost streptococcal GN  <response>: Refer p 936 Most common cause of papillary necrosis is diabetes mellitus Acute papillary necrosis is most often a complication of acute pyelonephritis in diabetes. Chronic papillary necrosis is seen in assoscation with analgesic nephropathy 