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Δευτέρα 15 Μαρτίου 2021

Long-Term Outcomes and Prognoses of Elderly Patients (≥65-Years-Old) With Distant Metastases From Well-Differentiated Thyroid Cancer During Radioiodine Therapy and Follow-Up

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Front Endocrinol (Lausanne). 2021 Feb 25;11:588024. doi: 10.3389/fendo.2020.588024. eCollection 2020.

ABSTRACT

OBJECTIVE: The objective of this study was to investigate the clinicopathological characteristics, long-term outcomes, and prognostic factors of elderly patients with distant metastases at initial diagnosis from well-differentiated thyroid cancer (WDTC) during radioactive iodine (131I) treatment and follow-up.

METHODS: A retrospective review of medical rec ords identified 183 elderly patients with DTC who underwent 131I treatment at our institution between 2006 and 2019.

RESULTS: In total, 57 elderly WDTC patients with distant metastases were enrolled in this study. After 131I treatment, 32 (56.14%) patients had 131I avidity and 25 (43.86%) had non-131I avidity; 35 (61.40%) cases were classified as radioiodine refractory (RR)-WDTC and 22 (38.60%) as non-RR-WDTC. At the end of follow-up, 25 (43.86%) patients had died and 32 (56.14%) were alive. The 5- and 10-year overall survival (OS) rates were 71.50% and 30.49%, respectively, while the 5- and 10-year disease-specific survival (DSS) rates were 76.89% and 48.71%, respectively. Multivariate analyses showed that gross extrathyroidal extension and RR-DTC were independent prognostic factors for poor OS (P=0.04 and P=0.03, respectively), while gross extrathyroidal extension, extrapulmonary distant metastases, and RR-WDTC were independent pro gnostic factors for poor DSS at the end of follow-up (P=0.02, P=0.03, and P=0.02, respectively).

CONCLUSIONS: WDTC with distant metastases at initial diagnosis accounted for 31.15% of all elderly patients with DTC. Gross extrathyroidal extension and RR-DTC were the major factors associated with poor OS; gross extrathyroidal extension, extrapulmonary distant metastases, and RR-DTC were independent prognostic factors for poor DSS in elderly DTC patients with distant metastases.

PMID:33716950 | PMC:PMC7947854 | DOI:10.3389/fendo.2020.588024

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