TY - JOUR
T1 - Serum thyroglobulin and 131I whole body scan after recombinant human TSH stimulation in the follow-up of low-risk patients with differentiated thyroid cancer
AU - Torlontano, Massimo
AU - Crocetti, Umberto
AU - D'Aloiso, Leonardo
AU - Bonfitto, Nazario
AU - Di Giorgio, Anna
AU - Modoni, Sergio
AU - Valle, Guido
AU - Frusciante, Vincenzo
AU - Bisceglia, Michele
AU - Filetti, Sebastiano
AU - Schlumberger, Martin
AU - Trischitta, Vincezo
PY - 2003/1/1
Y1 - 2003/1/1
N2 - Objective: The 'standard' postoperative follow-up of patients with differentiated thyroid cancer (DTC) has been based upon serum thyroglobulin (Tg) measurement and 131I whole body scan (131I-WBS) after thyroid hormone (T4) treatment withdrawal. However, 131I-WBS sensitivity has been reported to be low. Thyroid hormone withdrawal, often associated with hypothyroidism-related side effects, may now be replaced by recombinant human thyroid stimulating hormone (rhTSH). The aim of our study was to evaluate the diagnostic accuracy of 131I-WBS and serum Tg measurement obtained after rhTSH stimulation and of neck ultrasonography in the first follow-up of DTC patients. Design: Ninety-nine consecutive patients previously treated with total thyroidectomy and 131I ablation, with no uptake outside the thyroid bed on the post-ablative 131I-WBS (low-risk patients) were enrolled. Methods: Measurement of serum Tg and 131I-WBS after rhTSH stimulation, and ultrasound examination (US) of the neck. Results: rhTSH-stimulated Tg was ≤ 1 ng/ml in 78 patients (Tg-) and > 1 ng/ml (Tg+) in 21 patients, including 6 patients with Tg levels > 5 ng/ml. 131I-WBS was negative for persistent or recurrent disease in all patients (i.e. sensitivity = 0%). US identified lymph-node metastases (confirmed at surgery) in 4/6 (67%) patients with stimulated Tg levels > 5 ng/ml, in 2/15 (13%) with Tg > 1 <5 ng/ml, and in 2/78 (3%) who were Tg-negative. Conclusions: (i) diagnostic 131I-WBS performed after rhTSH stimulation is useless in the first follow-up of DTC patients; (ii) US may identify lymph node metastases even in patients with low or undetectable serum Tg levels.
AB - Objective: The 'standard' postoperative follow-up of patients with differentiated thyroid cancer (DTC) has been based upon serum thyroglobulin (Tg) measurement and 131I whole body scan (131I-WBS) after thyroid hormone (T4) treatment withdrawal. However, 131I-WBS sensitivity has been reported to be low. Thyroid hormone withdrawal, often associated with hypothyroidism-related side effects, may now be replaced by recombinant human thyroid stimulating hormone (rhTSH). The aim of our study was to evaluate the diagnostic accuracy of 131I-WBS and serum Tg measurement obtained after rhTSH stimulation and of neck ultrasonography in the first follow-up of DTC patients. Design: Ninety-nine consecutive patients previously treated with total thyroidectomy and 131I ablation, with no uptake outside the thyroid bed on the post-ablative 131I-WBS (low-risk patients) were enrolled. Methods: Measurement of serum Tg and 131I-WBS after rhTSH stimulation, and ultrasound examination (US) of the neck. Results: rhTSH-stimulated Tg was ≤ 1 ng/ml in 78 patients (Tg-) and > 1 ng/ml (Tg+) in 21 patients, including 6 patients with Tg levels > 5 ng/ml. 131I-WBS was negative for persistent or recurrent disease in all patients (i.e. sensitivity = 0%). US identified lymph-node metastases (confirmed at surgery) in 4/6 (67%) patients with stimulated Tg levels > 5 ng/ml, in 2/15 (13%) with Tg > 1 <5 ng/ml, and in 2/78 (3%) who were Tg-negative. Conclusions: (i) diagnostic 131I-WBS performed after rhTSH stimulation is useless in the first follow-up of DTC patients; (ii) US may identify lymph node metastases even in patients with low or undetectable serum Tg levels.
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U2 - 10.1530/eje.0.1480019
DO - 10.1530/eje.0.1480019
M3 - Article
C2 - 12534353
AN - SCOPUS:0037265913
VL - 148
SP - 19
EP - 24
JO - European Journal of Endocrinology
JF - European Journal of Endocrinology
SN - 0804-4643
IS - 1
ER -