Background: Certain patient demographics and histopathologic features are risk factors for papillary thyroid cancer (PTC) recurrence after initial treatment. Our objective was to determine whether very young age is associated with aggressive pathologic features in patients with PTC.
Materials And Methods: A retrospective analysis was performed for PTC patients who underwent surgical treatment at the University of Michigan between 2006 and 2012. Patients with known distant metastases were excluded. Demographics, high-risk pathologic features (capsular or vascular invasion, extrathyroidal extension, lymph node metastases, and extranodal extension), and disease recurrence were analyzed.
Results: 632 PTC patients were included in the analysis. Median age was 49 y (range 10-87). Tumors in patients aged <25 y had higher rates of extranodal extension (P = 0.002) compared with patients aged 25-44 y. Patients aged <25 y had more vascular invasion (P < 0.001) and lymph node metastasis (P = 0.001) than tumors in patients aged between 45-75 y. Patients aged >75 y had higher rates of vascular invasion (P < 0.001) and extrathyroidal extension (P = 0.001) compared with patients aged 45-75 y and more extrathyroidal extension (P < 0.001) than patients aged 25-44 y. There were no differences in tumor characteristics between the <25 and >75 age groups.
Conclusions: PTC patients aged <25 y of age or older than 75 y exhibit higher rates of aggressive histopathologic features compared to PTC patients aged between 25-75 y.
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