Renal papillary necrosis is a severe condition that affects the kidneys and damages the tissues in the renal papilla. There are several synonyms for renal papillary necrosis like renal necrosis, papillary necrosis, medullary necrosis, and kidney infarction. Kidney infarction is a condition that can lead to renal papillary necrosis due to the obstruction of blood flow to the kidneys. Medullary necrosis is when there is tissue death in the medulla, which is also responsible for renal papillary necrosis. Papillary necrosis is a more general term used to describe the death of the renal papilla. Overall, these synonyms are essential to understand the severity and different aspects of renal papillary necrosis.