Fine-needle aspiration of thyroid nodules: A study of 4703 patients with histologic and clinical correlations

The Papanicolaou Society of Cytopathology recently proposed 6 diagnostic categories for the classification of thyroid fine-needle aspiration (FNA) cytology. Using these categories, the experience with FNA from 2 institutions was studied with emphasis on cytologic-histologic correlation, source of errors, and clinical management.Patient cytology data were retrieved by a retrospective search of thyroid FNA in the institutional databases. Cytologic...