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Table 5 The Bethesda System for Reporting Thyroid Cytopathology (TBSRTC) – according to Cibas and Ali [6]

From: Proposed algorithm for management of patients with thyroid nodules/focal lesions, based on ultrasound (US) and fine-needle aspiration biopsy (FNAB); our own experience

Diagnostic category

Risk of malignancy (%)

I Nondiagnostic or unsatisfactory

1-4

II Benign

0-3

III Atypia of undetermined significance or follicular lesion of undetermined significance

5-15

IV Follicular neoplasm or suspicious for a follicular neoplasm

15-30

V Suspicious for malignancy

60-75

VI Malignant

97-99

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Thyroid Research

ISSN: 1756-6614