Thyroid cancer pathologic upstaging: Frequency and related factors

Area of Science:

• Oncology
• Pathology
• Surgical Oncology

Background:

• Histopathologic assessment of thyroid tumors can lead to stage migration, impacting treatment and prognosis.
• Accurate cancer staging is essential for effective patient management and therapeutic decisions.

Purpose of the Study:

• To determine the frequency of pathologic upstaging in thyroid tumors.
• To identify patient and tumor factors associated with upstaging.
• To compare upstaging rates between total and partial thyroidectomy.

Main Methods:

• Retrospective analysis of 5,351 primary thyroid cancers treated between 2013 and 2015.
• Defined upstaging as final pathologic stage exceeding clinical stage for tumor, nodal, and summary stages.
• Utilized multivariate logistic regression and Chi-squared tests to assess associations.

Main Results:

• Upstaging rates were 17.5% for tumor, 18.0% for nodal, and 10.9% for summary stage.
• Associated factors included age, Asian race, lymphovascular invasion, and follicular histology.
• Upstaging was significantly more frequent after total thyroidectomy compared to partial thyroidectomy for all stages.

Conclusions:

• Pathologic upstaging is a considerable event in thyroid tumors, especially following total thyroidectomy.
• Understanding these upstaging patterns is vital for precise patient counseling and informed clinical decision-making.