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Beyond the Neck: When Is Thoracic Operation Needed for Thyroidectomy?

Rongzhi Wang1, Zhixing Song, Sanjana Balachandra

  • 1From the Department of Surgery, University of Alabama at Birmingham, Birmingham, AL.

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|March 21, 2025
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Summary
This summary is machine-generated.

Intrathoracic thyroid glands requiring thoracic surgery assistance during thyroidectomy can be predicted by CT scan measurements. Glands extending over 5.3 cm below the sternal notch or with large horizontal dimensions indicate a higher likelihood of needing assistance.

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Area of Science:

  • Thoracic Surgery
  • Endocrine Surgery
  • Diagnostic Imaging

Background:

  • Most intrathoracic thyroid glands are managed via cervical incision.
  • Some cases require intraoperative thoracic surgery assistance for thyroidectomy.
  • Predictive CT findings for thoracic assistance are not well-established.

Purpose of the Study:

  • To identify computed tomography (CT) findings that predict the need for thoracic surgery assistance during thyroidectomy for intrathoracic thyroid glands.

Main Methods:

  • Retrospective review of 7,370 thyroidectomies (2012-2023).
  • Detailed CT analysis of 255 patients with intrathoracic thyroid glands (extension below sternal notch).
  • Receiver operating characteristic (ROC) and multivariable regression analyses were performed.

Main Results:

  • 34% of patients with intrathoracic thyroid glands required thoracic assistance.
  • Larger gland dimensions (anteroposterior, craniocaudal, horizontal) and posterior mediastinal extension predicted need for assistance.
  • Distance to sternal notch (AUC=0.94) was a strong predictor; thresholds of >5.3 cm below sternal notch, >5.2 cm AP dimension, and >5.3 cm horizontal dimension showed high sensitivity and specificity.

Conclusions:

  • CT findings, including size and extension below the sternal notch, can predict the need for thoracic surgery assistance.
  • Thyroid glands extending >5.3 cm below the sternal notch or with horizontal dimensions >5.3 cm warrant preoperative thoracic surgery consultation.