Correlation of technetium-99m MIBI and thallium-201 retention in solitary cold thyroid nodules with postoperative histopathology

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作者
Erdil, Tanju Yusuf [1 ,5 ]
Özker, Kutlan [2 ]
Kabasakal, Levent [3 ]
Kanmaz, Bedii [3 ]
Sönmezoglu, Kerim [3 ]
Atasoy, Kayhan Çetin [4 ]
Turoglu, Halil Turgut [1 ]
Uslu, Ilhami [3 ]
Isitman, Ali Tan [2 ]
Önsel, Çetin [3 ]
机构
[1] Department of Nuclear Medicine, Marmara University, School of Medicine, Istanbul, Turkey
[2] Department of Radiology, Medical College of Wisconsin, Milwaukee, WI, United States
[3] Department of Nuclear Medicine, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
[4] Department of Radiology, Ankara University, School of Medicine, Ankara, Turkey
[5] Ataköy 7-8.Kisim, A23 B Blök Daire 102, Ataköy, Istanbul, 34750, Turkey
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摘要
A comparative prospective study of technetium-99m methoxyisobutylisonitrile (MIBI) and thallium-201 with early (15 min) and delayed (90 min for MIBI, 3 h for 201T1) imaging in the differentiation of thyroid lesions is presented. Forty patients with cold thyroid nodules visualised on 99mTc-pertechnetate scan and with dyskaryotic or atypical epithelial cells verified by fine-needle aspiration biopsy underwent MIBI and 201T1 scintigraphy at 3-day intervals. Subsequent thyroidectomies were carried out in all patients. Semiquantitative analysis was performed using a lesion to non-lesion ratio on early (ER) and delayed images (DR). Additionally, a retention index (RI) was calculated using the formula RI=(DR-ER) × 100/ER. The reproducibility of the method for the early and delayed measurements was tested by analysing intra- and inter-observer variability and repeatability coefficients. Histopathologically, the nodules were found to be well-differentiated thyroid cancer in 21 patients and benign in 19 patients. There was no significant difference in the ER between malignant and benign lesions for either 201T1 or MIBI (P>0.05). However, for both agents significant differences were found between malignant and benign lesions with regard to DR (P201T1 and P0.05) except with regard to DR and RI in malignant nodules (P201T1 were selected. Using these threshold levels, the sensitivity, specificity and accuracy of the study were 90.5%, 36.8% and 65% for ER MIBI, 61.9%, 94.7% and 77.5% for DR MIBI, 95.2%, 89.4% and 92.5% for RI MIBI, 85.7%, 47.3% and 67.5% for ER 201T1, 80.9%, 73.6% and 77.5% for DR 201T1, and 90.5%, 94.7% and 92.5% for RI 201T1. In conclusion, the DR for MIBI and 201T1 is superior to the ER in detecting malignant nodules, and the RI for both MIBI and 201T1 is more valuable than the DR in differentiating malignant from benign thyroid nodules. © Springer-Verlag 2000.
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页码:713 / 720
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