Hot spot on Tc-99 is seen in which parotid tumor?

Hot spot on Tc-99 is seen in adenolymphoma (also known as Wahin's tumor). Wahin tumor, or papillary cystadenoma lymphomatosum, is the second most common benign parotid tumor . Because of the high mitochondrial content within oncocytes, the oncocyte-rich Wahin tumor and oncocytomas incorporate technetium-99m and appear as hot spots on radionuclide scans.