Bilateral papillary cystadenoma lymphomatosum of the parotid gland without accumulation of technetium 99m pertechnetate: report of a case and review of the literature. An unusual case of bilateral papillary cystadenoma lymphomatosum of the parotid with multiple lesions showing no active uptake of 99mTc pertechnetate is presented. Similar cases showing no accumulation of radionuclide are reviewed. 