USE OF TECHNETIUM TC 99M SESTAMIBI FOR DETECTION OF A PARATHYROID ADENOMA IN A DOG WITH PRIMARY HYPERPARATHYROIDISM

Double-phase parathyroid gland scintigraphy using technetium Tc 99m se stamibi, correctly identified the existence and location of a parathyr oid adenoma in a dog with primary hyperparathyroidism. The parathyroid adenoma was removed surgically 2 days after scintigraphy. An area of focal radionuclide uptake persisted in the region corresponding to the left external parathyroid gland in the delayed-phase image. Delayed-p hase images from 3 healthy dogs and a dog with hypercalcemia of malign ancy caused by lymphoma did not reveal an area of persistent radiotrac er uptake. Double-phase parathyroid gland scintigraphy, using Tc-99m-s estamibi, is a simple, rapid, noninvasive test, which can be used for detection and localization of parathyroid adenomas in hypercalcemic do gs. It also can help to differentiate these dogs from dogs with hyperc alcemia of malignancy.