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A new interesting article has been published in Clin Chem Lab Med. 2019 Jul 26;57(8):1185-1191. doi: 10.1515/cclm-2018-1390. and titled:

Measuring thyroglobulin in patients with thyroglobulin autoantibodies: evaluation of the clinical impact of BRAHMS Kryptor® Tg-minirecovery test in…

Authors of this article are:

Giovanella L, Verburg FA, Trimboli P, Imperiali M, Keller F, Ceriani L.

A summary of the article is shown below:

Background The present study was undertaken to evaluate the clinical impact of a thyroglobulin (Tg) minirecovery test (Tg-mRec) in a large series of differentiated thyroid carcinoma (DTC) patients treated and monitored homogeneously in a tertiary referral center. Methods Included were 1120 serum samples from 798 DTC patients. Tg, Tg autoantibodies (TgAb) and Tg-mrec measurements were performed on the automated Kryptor® platform and results compared to the corresponding clinical status. Results Among included samples 228 (20%) were TgAb-positive (TgAb+) and 892 (80%) TgAb-negative (TgAb-), respectively. Tg cutoff points were settled at 0.31 μg/L and 0.15 μg/L for TgAb- and TgAb+ patients, respectively, by ROC curve analysis. The diagnostic performance of serum Tg was reduced in TgAb+ compared to TgAb- patients, however, 87% of TgAb+ patients with recurrent disease and, particularly, all patients with distant metastases were correctly detected by adopting an optimized Tg cutoff for TgAb+ patients. A disturbed recovery was found in only 1% of TgAb- patients and in these cases no clinically relevant information was added by the Tg-mRec. Among TgAb+ patients with undetectable Tg and undisturbed Tg-mRec, no one had recurrent disease. However, a falsely undetectable Tg was demonstrated in two patients with recurrent disease who next to increased TgAb also had a disturbed Tg-mRec test. Conclusions There is no additional clinical benefit from performing Tg-mRec in most patients. It can however be considered in TgAb+ patients with undetectable Tg levels as it may help differentiate between patients with true negative and false negative Tg levels in the presence of such antibodies.

Check out the article’s website on Pubmed for more information:

This article is a good source of information and a good way to become familiar with topics such as: differentiated thyroid carcinoma;minirecovery;thyroglobulin;thyroglobulin antibodies.

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