What should you know about an FNB biopsy?

FNB is often used as a short name for fine-needle biopsy or fine-needle sampling. The clinician identifies the target, cleans the skin and may inject local anaesthetic before guiding a fine needle into it. Depending on the technique, suction collects cells or a small amount of material for a pathologist. Ultrasound or another scan can improve placement. The report may describe normal, benign, malignant or insufficient material, but the meaning depends on the target and the question being asked. A fine-needle sample may not show the full structure of a lesion.

Give the team a complete medicine list, including blood thinners, and mention allergies, bleeding conditions and pregnancy. Check whether fasting is required and ask how to care for the puncture site. Mild tenderness or bruising can occur. If the sample needs further characterisation, the laboratory may use Immunohistochemistry or Genomic Tumour Profiling. An MRI Scan can provide additional anatomical information when appropriate. If cancer is confirmed, your team may discuss options such as Chemotherapy according to the diagnosis and treatment plan.

Report persistent bleeding, increasing pain, redness, warmth, swelling, discharge or fever after the procedure. Get urgent medical help for breathing difficulty, fainting, sudden weakness or fast-growing swelling. Tell the service exactly where the needle was inserted so they can give site-specific advice.

Ask what FNB means at your centre, what kind of material will be collected, whether imaging guidance is planned, how the report will be shared, and what test may follow if the sample is insufficient.