False diagnosis of recurrent thyroid carcinoma: the importance of testing for heterophile antibodies
Leila Guastapaglia,
Maria Izabel Chiamolera,
José Viana Lima
et al.
Abstract:SUMMARY
Thyroglobulin (Tg) levels are important to predict recurrence in differentiated thyroid cancer patients. However, false-positive results can hence the request of unnecessary tests and treatments. We reported two cases of interference in thyroglobulin measurement and the workup to investigate them. Both patients achieved an excellent response to therapy after total thyroidectomy and one patient had also received radioiodine treatment. During the follow-up, Tg levels increased and there was no… Show more
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