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The continuing role of breast fine‐needle aspiration biopsy after the introduction of the IAC Yokohama System For Reporting Breast Fine Needle Aspiration Biopsy Cytopathology

Ultrasound‐guided fine‐needle aspiration biopsy (FNAB) (US‐guided FNAB) is a rapid and cost‐effective procedure for the diagnosis of breast lesions. Our Institution has a long tradition in breast FNAB performed by cytopathologists; recently we adopted both US guidance and a five‐tiered classification system similar to that proposed by the International Academy of Cytology (IAC). The aim of this study was to demonstrate the continuing role of US‐guided FNAB in the diagnosis of breast lesions, despite the growing adoption of core‐needle biopsy (CNB).