Statistically speaking, approximately what percentage of thyroid nodule FNA biopsies are Bethesda category 1 (= nondiagnostic or unsatisfactory), and what percentage are indeterminate (Bethesda category 3 and 4)?
1 Answers
Mednet Member
Endocrinology · Boston University Geriatric Services
This is highly institution-specific, but on average:
About 10% of biopsies will be nondiagnostic.
About 15-30% of biopsies will be indeterminate (Bethesda 3 or 4).
