Bethesda classification system for thyroid fine needle aspirates

Last revised by Ammar Ashraf on 4 Dec 2022

Bethesda classification system for thyroid fine needle aspirates comprises six categories of pathological reporting of thyroid FNA, with each category linked to a malignancy risk.

Classification

  • category I: non-diagnostic

  • category II: benign

  • category III: atypia of undetermined significance

  • category IV: suspicious for follicular neoplasm

  • category V: suspicious for malignancy

  • category VI: malignant

See also

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