Abstract |
We studied 65 patients with hypercalcemia who had beed
performed 201T1/99mTc subtraction scan, 21 of them were
confirmed as parathyroid tumor (19 adenoma, 2
carcinoma). The diagnostic sensitivity of 201T1/99mTc
subtraction scan for detecting parathyroid mass was
90.5%, specificity was 97.6%, ultrasonography was
80.6%, 58.8%, respectively. The causes of two false
negative cases were relatively small size (1.5*1*8cm)
compared to remainig cases and poor thallium uptake due
to cystic necrosis of parathyroid adenorna. The one
false positive case was non-functioning thyroid nodule.
21T1/99mTc subtraetion scan was simple, effective
diagnostic tool and superior to ultrasonography for
evaluating the parathyroid mass with high sensitivity
and specificity. |