Bethesda System
Pronunciation: buh-THEZ-dah
Also written as: TBSRTC — The Bethesda System for Reporting Thyroid Cytopathology
A standardized classification system for reporting thyroid fine needle aspiration cytology results.
Full Definition
The Bethesda System for Reporting Thyroid Cytopathology is a standardized framework introduced in 2007 and updated in 2017 to provide consistent terminology and management recommendations for thyroid FNA results. The system includes six diagnostic categories: nondiagnostic, benign, atypia of undetermined significance (AUS), suspicious for follicular neoplasm, suspicious for malignancy, and malignant. Each category is associated with specific malignancy risk percentages and management recommendations. This system has significantly improved communication between pathologists, clinicians, and patients while standardizing thyroid nodule management protocols worldwide.
Usage
Usage note: Capitalize 'Bethesda System' as proper noun; use Roman numerals for categories.
In Context
- "Cytology was reported as Bethesda Category IV, suspicious for follicular neoplasm." — Pathology report
- "The updated Bethesda System includes refined criteria for atypia of undetermined significance." — Medical literature review