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Consideration of Early Dynamic Risk Stratification to Guide Discharge from Oncologic Follow-up in Patients with Differentiated Thyroid Cancer.
Thyroid : Official Journal of the American Thyroid Association 2024 September 17
BACKGROUND: The current dogma is a life-long follow-up for patients treated for follicular-derived differentiated thyroid cancers (DTC). Our primary objective was to determine the time to recurrence in a series of DTC patients with an excellent response to therapy 6 months after total thyroidectomy and radioiodine therapy. The secondary objectives were to determine the time to suspicion of recurrence and to identify factors associated with recurrence.
METHODS: This retrospective cohort study included patients treated for DTC between 2008 and 2012 and in remission 6 months after total thyroidectomy and radioiodine treatment. The criteria for remission were negative imaging and suppressed thyroglobulin (Tg) < 0.2 ng/mL or rh-TSH-(recombinant human TSH) stimulated Tg < 1 ng/mL according to the 2015 ATA (American Thyroid Association) guidelines. Recurrence was defined by cytologically and/or histologically proven cervical lymph node metastasis or the administration of a second radioiodine treatment.
RESULTS: Among 721 patients treated for DTC, 158 were excluded because of persistent disease at 6 months and 71 because of missing follow-up data and 492 were included. The mean and median follow-up time were 7.0 and 7.9 years [IQR 2.1-11.3]. Recurrence occurred for 7 patients (1.4%), 1 initially classified as high recurrence risk, 3 as intermediate and 3 as low risk according to the 2015 ATA guidelines. All relapses occurred within 10 years after initial management (4 within the first 5 years). For patients with recurrence, rise in Tg and/or suspicious lymph node were detected in 6 out of 7 cases in the first 8 years, and for the last case 10 years after initial surgery.
CONCLUSION: Low and intermediate recurrence risk DTC patients with excellent response 6 months after total thyroidectomy and radioiodine and in remission 10 years later have an extremely low recurrence risk. Follow-up might be undertaken by primary care providers from this time point. These discharge recommendations should be confirmed by further prospective studies.
METHODS: This retrospective cohort study included patients treated for DTC between 2008 and 2012 and in remission 6 months after total thyroidectomy and radioiodine treatment. The criteria for remission were negative imaging and suppressed thyroglobulin (Tg) < 0.2 ng/mL or rh-TSH-(recombinant human TSH) stimulated Tg < 1 ng/mL according to the 2015 ATA (American Thyroid Association) guidelines. Recurrence was defined by cytologically and/or histologically proven cervical lymph node metastasis or the administration of a second radioiodine treatment.
RESULTS: Among 721 patients treated for DTC, 158 were excluded because of persistent disease at 6 months and 71 because of missing follow-up data and 492 were included. The mean and median follow-up time were 7.0 and 7.9 years [IQR 2.1-11.3]. Recurrence occurred for 7 patients (1.4%), 1 initially classified as high recurrence risk, 3 as intermediate and 3 as low risk according to the 2015 ATA guidelines. All relapses occurred within 10 years after initial management (4 within the first 5 years). For patients with recurrence, rise in Tg and/or suspicious lymph node were detected in 6 out of 7 cases in the first 8 years, and for the last case 10 years after initial surgery.
CONCLUSION: Low and intermediate recurrence risk DTC patients with excellent response 6 months after total thyroidectomy and radioiodine and in remission 10 years later have an extremely low recurrence risk. Follow-up might be undertaken by primary care providers from this time point. These discharge recommendations should be confirmed by further prospective studies.
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