A DMSA scan is a radionucleotide scan that uses dimercaptosuccinic acid in assessing the renal function, it is now the most reliable test for the diagnosis of Acute pyelonephritis.[1] The major clinical indications for this investigation are the detection and/or evaluation of a renal scar, the small or absent kidney, an occult duplex system, certain renal masses, systemic hypertension or suspected vasculitis.[2]