XXXX : comparison of MR imaging with radionuclide scanning.

@entity1 @entity1136 @entity459 @entity3528 @entity2742 @entity454
Twenty-three @entity1 with @entity2742 were evaluated preoperatively with magnetic resonance (MR) imaging. Twenty @entity1 also underwent thallium-201/ @entity1136 scintigraphy. Of 22 @entity1 with @entity459 , 12 had persistent or recurrent disease. One had @entity3528 due to @entity454 . MR imaging allowed accurate localization of abnormal parathyroid glands in 64% evaluated prospectively and 82% evaluated retrospectively. Scintigraphy allowed localization of 60% evaluated prospectively and 70% retrospectively. The two imaging modalities together allowed detection of 68% evaluated prospectively and 91% retrospectively. MR imaging allowed detection of two of five mediastinal adenomas evaluated prospectively and four of five retrospectively. In @entity1 who underwent both imaging studies, MR was more successful in those with previous neck surgery (73% evaluated prospectively and 91% retrospectively) than in those with no prior surgery (57% prospectively and 71% retrospectively). Scintigraphy allowed accurate localization in 64% evaluated prospectively and 64% retrospectively in @entity1 with previous surgery versus 57% prospectively and 86% retrospectively in @entity1 with no prior neck surgery. Four false-positive results were obtained with MR imaging and three with scintigraphy. MR imaging was useful for parathyroid localization in @entity1 with @entity2742 , particularly in @entity1 requiring additional surgery.
