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Related Experiment Videos

Thyroid frozen section: flawed but helpful

P J Crowe1, R Chetty, D M Dent

  • 1Department of Surgery, Groote Schuur Hospital, University of Cape Town, South Africa.

The Australian and New Zealand Journal of Surgery
|April 1, 1993
PubMed
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Frozen section (FS) thyroid histology has limited accuracy, especially for follicular neoplasms, often leading to misdiagnosis. While FS can guide immediate surgery in rare cancer cases, its overall utility in thyroid nodule management remains debated.

Area of Science:

  • Pathology
  • Surgical Oncology
  • Endocrinology

Background:

  • The diagnostic utility of frozen section (FS) thyroid histology is debated.
  • Accurate intraoperative assessment of thyroid nodules is crucial for patient management.

Purpose of the Study:

  • To retrospectively analyze the accuracy of FS thyroid histology compared to permanent histology.
  • To evaluate the impact of FS diagnosis on surgical management decisions.

Main Methods:

  • Retrospective analysis of 241 thyroidectomy cases with FS and permanent histology.
  • Comparison of FS diagnoses with final diagnoses, noting discrepancies and their impact.

Main Results:

  • FS correctly identified carcinoma in only 22% of cases (5/23).

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  • A significant proportion of FS diagnoses were incorrect (15/23) or deferred (3/23), primarily due to follicular neoplasms.
  • No false positives were observed in benign cases, with a 6.2% conversion rate from benign to malignant on permanent histology.
  • FS influenced surgical management, prompting immediate contralateral surgery in diagnosed cancers but less often in cases with negative FS despite later confirmed malignancy.

    • Conclusions:

    • Frozen section (FS) thyroid histology has limited accuracy, particularly for follicular neoplasms, potentially impacting surgical decisions.
    • While FS can be helpful in a small subset of thyroid cancer cases, its interpretation requires careful consideration of risk factors and multidisciplinary input.
    • Improved collaboration between pathologists and surgeons may enhance the effective use of FS in managing thyroid nodules.