Fine needle aspiration cytology (FNAC), also called fine needle biopsy, is performed on palpable lesions in the breast and in cases of inconclusive ultrasound findings. Under the guidance of palpation or ultrasound, the method is both simple and quick. Mammography guided biopsy is performed to a lesser extent.
A positive cytology result confirming a breast cancer diagnosis can be sufficient for further treatment measures if there is agreement between cytology, radiology, and the clinical examination.
The method requires a close collaboration between cytologist, radiologist, and clinician. Therefore, the method is being frequently replaced, both in Norway and internationally, frequently by coarse needle core biopsy.
- To conclude if a lesion, palpable or non-palpable, is benign or malignant.