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Τρίτη 22 Φεβρουαρίου 2022

Clinical outcomes of a cohort of 271 patients with lung metastases from differentiated thyroid carcinoma

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Clin Endocrinol (Oxf). 2022 Feb 22. doi: 10.1111/cen.14700. Online ahead of print.

ABSTRACT

CONTEXT: Lung is the most common site of distant metastases from differentiated thyroid carcinoma (DTC).

OBJECTIVE: To investigate the outcomes of a cohort of patients with DTC and lung metastases (LM).

METHODS: A retrospective analysis of a cohort of 271 patients with LM was performed.

RESULTS: The female-to-male ratio was 1:1 and the median follow-up time was 5.9 (1.1-38. 4) years. Papillary thyroid carcinoma (PTC) was the most frequent type (83.4%), mainly the classic variant, followed by follicular thyroid carcinoma (FTC, 10.3%) and Hürthle cell carcinoma (HTC, 6.3%). The prevalence of PTC, FTC and HCC was different between the micronodular and macronodular LM groups [87.4%, 6.3% and 6.3 % vs 74.6%, 19.0% and 6.3%, respectively (p=0.013)]. Only 5.0% of the patients had LM diagnosed after a period of remission. LM were submitted to radioactive iodine treatment (RAIT) in 84.5% (52.8% showed 131iodine avid metastases). Complete remission was only achieved in 12.2%. Micronodular disease and age <55 years at LM diagnosis were associated with a better prognosis (p<0.05). We found no difference in survival between patients with LM treated or not with RAIT. However, in patients submitted to RAIT, there was a tendency for longer survival in the group of patients with 131I avid lesions.

CONCLUSION: The classic variant of PTC was the most frequen t histology found in LM of DTC. LM are rarely diagnosed in the follow-up when complete remission is achieved after surgery and 131I. Younger age at LM diagnosis and a micronodular pattern are associated with a better prognosis. This article is protected by copyright. All rights reserved.

PMID:35192239 | DOI:10.1111/cen.14700

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