Thyroid disease

Diagnostic utility of repeat fine needle aspirations of benign thyroid nodules

Eur Thyroid JPublished Retrospective diagnostic accuracy study

Authors' conclusion

Repeat FNA biopsies did not provide an additional diagnostic value in the evaluation of benign thyroid nodules, and often led to unwarranted follow-up procedures and significantly increased health care cost.

Study context

Population
Thyroid nodules with initially benign FNA diagnosis over a 5-year period; mean age 57.4 years (range 11–93), 83.8% female
Participants
1,658 benign nodules
Comparison
Single FNA vs one-time repeat FNA vs multiple repeat FNA of initially benign thyroid nodules
  • One-time repeatn = 141
  • Multiple repeatn = 42
Outcome
Diagnostic utility (PPV) of repeat FNA of initially benign thyroid nodules

Performance

As reported in the abstract

PPV

One-time repeat vs Single FNA: P < 0.001 · Multiple repeat vs Single FNA: P = 0.002

Further findings

Repeat FNA results and resection outcomes

Benign nodules without repeat FNA with benign resection
124
One-time repeat: remained benign on repeat FNA
101 (13 benign on resection)
One-time repeat: atypical repeat FNA
11 (5 resected: 4 benign, 1 atypical follicular neoplasm with HRAS and TERT promoter mutations)
Multiple repeat: still benign on repeat FNA
35 (1 benign resection)
Multiple repeat: atypical repeat biopsies
2 (1 PTC on resection with CCD6::RET fusion)

Total cost for workup of previously benign nodules

Total cost
$285,454

Original publication

Diagnostic utility of repeat fine needle aspirations of benign thyroid nodules. Eur Thyroid J. Published 23 February 2024. doi:10.1530/etj-23-0153

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