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. 2022 Aug;77(2):297-304.
doi: 10.1007/s12020-022-03071-2. Epub 2022 May 19.

Long-term follow-up ultrasonography surveillance in a large cohort of patients with papillary thyroid carcinoma

Jing-Wen Zhang #  1 , Meng-Jia Fei #  2 , Yi-Qing Hou  1 , Zhen-Yun Tang  1 , Wei-Wei Zhan  3 , Jian-Qiao Zhou  4
Affiliations

Long-term follow-up ultrasonography surveillance in a large cohort of patients with papillary thyroid carcinoma

Jing-Wen Zhang et al. Endocrine. 2022 Aug.

Abstract

Objective: This study aimed to investigate the predictive factors as well as the time and age course of recurrence/persistence in a large cohort of postoperative patients with papillary thyroid carcinoma (PTC) based on the long-term ultrasonography (US) follow-up data.

Methods: Between January 2007 and December 2016, 3106 patients underwent surgery for PTC and at least two postoperative US follow-up examination over more than three years. Tumor recurrence/persistence was confirmed based on the follow-up US data and histopathological results. Univariate and multivariate analyses were performed to evaluate the predictive factors of tumor recurrence/persistence. Kaplan-Meier survival analysis was used to evaluate the recurrence-/persistence-free survival curve based on the US results.

Results: A total of 321(10.3%) patients developed tumor recurrence/persistence during 54.3 months of mean follow-up (range 36-135 months), including 268(83.5%) cases of lymph node recurrence/persistence, 37 (11.5%) cases of non-lymph node recurrence/persistence, and 16(5%) cases of both types. Recurrence/persistence was observed using US examination at a mean interval of 23.6 ± 21.6 months (range 1-135 months) after surgery and peak incidence was observed 1-2 years after initial treatment. Younger (20-30 years old) and older (70-80 years old) patients had a higher proportion of tumor recurrence/persistence. Multifocality, advanced T and advanced N stages were independent risk factors of tumor recurrence/persistence.

Conclusion: Tumor recurrence/persistence of PTC usually occurs during the early postoperative period. For patients with multifocal cancer, advanced T and N stage, the US surveillance examination should be cautiously performed, especially in younger and older patients.

Keywords: Follow-up; Papillary thyroid carcinoma; Recurrence; Surveillance; Ultrasonography.

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