PREOPERATIVE RADIOLOGICAL DIAGNOSIS BY ^99mTC·EMIBI-^99mTC SUBTRACTION SCINTIGRAPHY FOR PRIMARY HYPERPARATHYROIDISM

Abstract

Preoperative radiological diagnosis constitutes the most important factor for the surgical treatment of hyperparathyroidism. In this regard, MRI is useful for detecting the abnormal parathyroid, but it is often difficult to localize it using MRI only. It is thus necessary to combine this procedure with excellent subtraction scintigraph.
We peformed both ²⁰¹T1-^99mTc and ^99mTc·EMIBI-^99mTc subtraction scintigraphy in seven patients with primary hyperparathyroidism and compared them the radiological results. Five patients presented parathyroid adenomas and the rest hypertrophy of the parathyroid. We could detect the abnormal parathyroid in four patients (57.1%) by ²⁰¹T1-^99mTc subtraction scintigraphy and in six patients (85.7%) by ^99mTc·MIBI-^99mTc subtraction scintigraphy. We therefore believe that ^99mTc·EMIBI-^99mTc subtraction scintigraphy will become an essential examination for primary hyperparathyroidism rather than the presently employed²⁰¹T1-^99mTc subtraction scintigraph.