Renal papillary necrosis

A forgotten entity

Abstract

Renal papillary necrosis (RPN) is a little-recognized entity defined as ischemic necrosis of one or several renal papillae, caused by various etiologies that must be investigated. Renal papillary necrosis may lead to papillary detachment within the urinary system, causing urethral obstruction, renal fossa pain, acute kidney injury and/or urinary tract infection.

The diagnosis requires laboratory tests and imaging studies like computed tomography urography and magnetic resonance imaging. Treatment is aimed at controlling the underlying cause, unblocking the urinary tract, if necessary, ensuring adequate hydration and avoiding the use of nephrotoxic agents.

Awareness and prompt identification of RPN are essential for preserving kidney function and improving patient outcomes.