Journal
ARCHIVES OF SURGERY
Volume 141, Issue 10, Pages 961-966Publisher
AMER MEDICAL ASSOC
DOI: 10.1001/archsurg.141.10.961
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Hypothesis: Clinical or cytologic factors predictive of malignancy can be identified and incorporated into a treatment algorithm for patients with a fine-needle aspiration biopsy (FNAB) specimen interpreted as suspicious for papillary thyroid cancer (PTC). Design: Retrospective review of a prospectively maintained database. Setting: University-affiliated tertiary care hospital. Patients: Seven hundred thirty-eight patients with nodular thyroid disease evaluated between 1990 and 2004. Interventions: Patients with an FNAB specimen suspicious for PTC were identified. The frequency of carcinoma was determined. Clinical features were reviewed. The FNAB specimens suspicious for PTC were examined in a blinded fashion to determine if specific cytologic features were important in distinguishing benign vs; malignant disease. Main Outcome Measures: The presence of specific clinical and cytologic features was correlated with the incidence of carcinoma. A secondary outcome measure was to determine the value of frozen section examination in establishing the extent of thyroidectomy. Results: Forty-five patients (7%) had an FNAB specimen suspicious for PTC; 18 (40%) of these patients had carcinoma. Prominent nuclear inclusions and/or grooves, papillary formations, and the absence of colloid were features associated with PTC (P<05). No clinical features reliably identified malignant disease. Frozen section examination results altered treatment in 15 (56%) of 27 patients. Conclusions: An FNAB specimen suspicious for PTC is associated with a 40% incidence of carcinoma. Extensive nuclear inclusions and/or grooves, papillary formations, and the absence of colloid are predictive of carcinoma. Rare intranuclear inclusions and/or grooves alone in an otherwise benign-appearing specimen are uniformly associated with benign disease. Frozen section examination is of value in determining the extent of thyroidectomy.
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