A DMSA scan is a radionuclide scan that uses dimercaptosuccinic acid (as a radioactive tracer) in assessing the renal morphology, structure (static scan) not a functional scan. It is now the most reliable test for the diagnosis of acute pyelonephritis. The major clinical indications for this investigation are the detection and/or evaluation of a renal scar, the small or absent kidney (renal agenesis), an occult duplex system, certain renal masses, systemic hypertension or suspected vasculitis.
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