Thyroid disease

Natural History of Cytologically Low-Risk Indeterminate Thyroid Nodules

J Clin Endocrinol MetabPublished Retrospective cohort study

An erratum to this article was published (J Clin Endocrinol Metab, 22 Apr 2025 ↗)

Authors' conclusion

These findings suggest that active surveillance is a safe option for managing TIR3A nodules, particularly when no additional risk factors are present. The study highlights the role of repeat FNAB in reducing unnecessary surgeries and underscores the generally indolent nature of TIR3A nodules.

Study context

Population
Patients with TIR3A (low-risk indeterminate) thyroid nodules on fine-needle aspiration biopsy (FNAB) performed July 2017–December 2019
Participants
371 patients
Exposure
Surgery vs Conservative follow-up
  • Surgeryn = 102
  • Conservative follow-upn = 269
Outcome
Malignancy rate among TIR3A nodules
Methodological detailssingle-centre
  • Single-centre

Main finding

As reported in the abstract

Malignancy rate

16.5%

Observational data: associations, not effects.

Further findings

Repeat FNAB

Repeat FNAB performed (of 269 followed conservatively)
120
Further patients undergoing surgery after repeat FNAB
13
More definitive diagnosis with repeat FNAB
40%
Increase in malignancy risk with repeat FNAB
5%

Nodule size and/or ultrasound (US) pattern in conservatively managed patients (149 without and 66 with FNAB repetition) · median follow-up 3.3 years

No significant changes in nodule size and/or US pattern

Original publication

Natural History of Cytologically Low-Risk Indeterminate Thyroid Nodules. J Clin Endocrinol Metab. Published 29 January 2025. doi:10.1210/clinem/dgaf052

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