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A core biopsy uses a hollow needle, guided by ultrasound or a scan, to take thin strips of tissue so a pathologist can say what an abnormality is. Breast biopsies are done under local anaesthetic in clinic, sometimes leaving a tiny marker. Liver biopsies need a plan for blood thinners and a few hours of observation; call the hospital for fever, breathlessness, heavy bleeding or bad pain.
Breast. The NHS Breast Screening Programme assesses significant abnormalities by core or vacuum-assisted biopsy, with ultrasound as the guidance of choice, a permanent image of the needle in the lesion, a marker clip where the lesion may be hard to find again or there are several, and review of every needle biopsy at the multidisciplinary meeting. Fine needle aspiration may be added to, not substituted for, core biopsy. Every woman with a non-operative diagnosis of invasive cancer has axillary ultrasound, with core biopsy of the most suspicious abnormal node preferred to fine needle aspiration where safe (NHSBSP 2026). B3 lesions of uncertain malignant potential are managed by the MDT, usually by vacuum-assisted excision.
Liver (BSG, RCR and RCPath 2020, GRADE). Give risk information in advance, verbally and in writing, in the form "of 1000 people like you" (Strong, high quality). Use image guidance for focal lesions (Strong). Bleeding occurs in up to 10%, major bleeding in under 2%, and death in fewer than 1 in 1000. Anticoagulants and antiplatelets are stopped by table 2: warfarin 5 days with an INR check, direct oral anticoagulants 2 days (longer for dabigatran with impaired kidney function), clopidogrel, prasugrel or ticagrelor 7 days, and aspirin 3 to 7 days for elective biopsies, considered against why it is taken (Moderate). An INR of 1.5 to 2.0 is not a contraindication to a targeted biopsy in stable liver disease, fresh frozen plasma is not used to correct an INR of 2.0 or less (Strong), and a platelet count below 50 x 10^9/L calls for a transvenous route where possible (Strong). Observe for at least 3 hours with pulse and blood pressure (Strong, weak evidence). People with a strong suspicion of malignancy are not biopsied as a day case, because they may bleed more. At discharge: rest the remainder of the day, no driving that day, no strenuous activity for 48 hours, and call the hospital for chills, fever, breathlessness, bright red bleeding, severe chest, shoulder or abdominal pain, blood in the stool or a swelling abdomen.
Why: People decide better, and worry less, when they have read about the procedure before the day.
“Patients should be given information about the risks and benefits of the procedure, in advance of the procedure where possible”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Strength of recommendation STRONG; quality of evidence HIGH
Why: A number out of a thousand is easier to picture than a percentage or a word like rare.
“Information on risks should be readily understood and the following is recommended ‘of 1000 people like you having a liver biopsy, X will develop (complication)’”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Strength of recommendation MODERATE; evidence WEAK
Why: Blood thinners raise the chance of bleeding inside the liver, but stopping them has its own risks, so each is timed.
“Direct oral anticoagulant drugs should be stopped for 2 days prior to the day of the biopsy or longer if taking dabigatran, depending on the renal function.”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Strength of recommendation STRONG; evidence WEAK (table 2)
Why: Aspirin adds a little to bleeding risk; for someone with a heart stent stopping it can be more dangerous, so a senior decision is needed.
“We recommend that, where time allows, stopping aspirin 3 days prior to percutaneous biopsy should be considered, but the decision will depend on the indications for aspirin and the urgency of the biopsy”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Strength of recommendation MODERATE; evidence WEAK
Why: Plasma has not been shown to reduce bleeding, and when platelets are very low a route through a vein in the neck avoids puncturing the liver surface.
“Where the platelet count is <50 x 10 9 /L, a transvenous approach is recommended, where possible”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Strength of recommendation STRONG; evidence MODERATE
Why: Seeing the needle reach the abnormality makes the sample more useful and avoids blood vessels.
“Image-guided liver biopsies should be used for targeting focal lesions or in patients with altered liver anatomy (such as split liver graft or prior liver resection)”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Strength of recommendation STRONG; quality of evidence WEAK
Why: A core of tissue tells the team whether a lump is cancer, what type, and how fast-growing; the image proves the right spot was sampled.
“Ultrasound is the technique of choice for guided needle sampling. A permanent record of images showing the biopsy needle in the target lesion should be made.”
NHS England, NHS Breast Screening Programme (gov.uk) 2026 · NHSBSP guidance (ungraded)
Why: The tiny metal marker lets the surgeon or radiologist find exactly the same spot later.
“Marker placing is particularly important to facilitate treatment planning/surgical localisation when there are multiple lesions or when there is any risk that the area of concern could be removed or rendered difficult to see by the biopsy.”
NHS England, NHS Breast Screening Programme (gov.uk) 2026 · NHSBSP guidance (ungraded)
Why: Knowing whether the lymph nodes are involved changes the operation and treatment plan.
“All patients with a non-operative diagnosis of invasive breast cancer should have ipsilateral axillary ultrasound performed, preferably at the time of initial assessment.”
NHS England, NHS Breast Screening Programme (gov.uk) 2026 · NHSBSP guidance (ungraded)
Why: The radiologist, pathologist and surgeon check together that the result matches the scan before anyone acts on it.
“All needle biopsies carried out as part of screening assessment must be reviewed at the multi-disciplinary meeting (MDM), where further management of each case should be agreed and documented.”
NHS England, NHS Breast Screening Programme (gov.uk) 2026 · NHSBSP guidance (ungraded)
Why: Bleeding after a liver biopsy usually shows itself in the first few hours, while the person is still in hospital.
“Patients should be monitored for at least 3 hours after liver biopsy with regular clinical observations and measurement of blood pressure and pulse”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Strength of recommendation STRONG; evidence WEAK
Why: Liver tumours can bleed more after a needle biopsy, so an overnight stay may be safer.
“Patients with a strong suspicion of malignancy should not be biopsied as a day case because such patients may have a higher risk of haemorrhage than patients without cancer.”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Text statement (no separate grade)
Why: These are the signs of the uncommon complications, bleeding, a leak or infection, that need treatment quickly.
“If a patient experiences any symptoms such as chills, high fever, difficulty breathing, excessive bright red bleeding from the biopsy site, severe chest, shoulder or abdominal pain, passing blood in the stool or increasing abdominal swelling, then they are instructed to call the hospital.”
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · Text statement (no separate grade)
How care is usually carried out, read from the guidelines and standards cited. Your own team's protocol and their judgement come first; this page is for understanding it, not for doing it yourself.
For liver core biopsy, the BSG, RCR and RCPath 2020 guideline is the most complete graded standard: advance written risk information in numbers out of 1000 (Strong), image guidance for focal lesions (Strong), a drug-by-drug plan for anticoagulants and antiplatelets (Strong, weak evidence), no fresh frozen plasma for an INR of 2.0 or less (Strong), a transvenous route when platelets are below 50 x 10^9/L (Strong), at least 3 hours of observation (Strong, weak evidence), no day-case biopsy when cancer is strongly suspected, and clear discharge advice. For breast core biopsy, the NHS Breast Screening Programme assessment guidance (updated January 2026) sets the standard in England: ultrasound-guided core or vacuum-assisted biopsy, a marker clip where needed, axillary ultrasound in invasive cancer and multidisciplinary review of every result. It does not address blood thinners or aftercare, which are left to local policy.
British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 · NHS England, NHS Breast Screening Programme (gov.uk) 2026
Where it differs: A thinner needle draws out cells rather than a strip of tissue.
Evidence: NHSBSP allows it in addition to core biopsy where high quality cytology with immediate reporting is available, and alone only in exceptional cases where core biopsy is not possible, because core biopsy gives invasive status, subtype, grade and receptor status.
Where it differs: Some units observe for 1 hour rather than 3.
Evidence: BSG notes one recent study suggesting 1 hour is enough to recognise all major complications, but recommends at least 3 hours for low-risk patients and up to 8 hours otherwise.
Where it differs: Aspirin is continued rather than paused.
Evidence: BSG table 2: for urgent biopsies aspirin can be continued at the clinician's discretion; empirical experience in post-transplant biopsies suggests pausing may not be necessary.
| Recommendation | Grade, as printed | Source |
|---|---|---|
| Advance risk information, verbal and written | Strength of recommendation STRONG; quality of evidence HIGH | British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 |
| Image guidance for focal liver lesions | Strength of recommendation STRONG; quality of evidence WEAK | British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 |
| No fresh frozen plasma to correct an INR of 2.0 or less “We recommend FFP should not be used to correct an INR ≤2.0 prior to liver biopsy” | Strength of recommendation STRONG; evidence MODERATE | British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 |
| Consider stopping aspirin 3 days before percutaneous biopsy where time allows | Strength of recommendation MODERATE; evidence WEAK | British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 |
| Monitor at least 3 hours after liver biopsy | Strength of recommendation STRONG; evidence WEAK | British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 |
| Day-case liver biopsy is safe when there are no increased risk factors and the person can get help after leaving “Liver biopsy may be safely done as a day case procedure if there are no increased risk factors and the patient can be looked after when they have left hospital, can seek appropriate advice and access appropriate medical help if needed” | Strength of recommendation STRONG; evidence WEAK | British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 |
| Risk of bleeding and death after percutaneous liver biopsy “Bleeding occurs in up to 10% with major bleeding occurring in less than 2%.” | Summary statement (ungraded) | British Society of Gastroenterology, Royal College of Radiologists and Royal College of Pathologists (Neuberger et al., Gut) 2020 |
Shares Anticoagulants and antiplatelet drugs around elective endoscopy and endoscopic biopsy, Core needle biopsy and fine-needle aspiration (FNA), Biopsy.
Shares Vacuum-assisted breast biopsy systems (Mammotome, EnCor, Eviva, Brevera), Ultrasound, Breast cancer (all types).
Shares Vacuum-assisted breast biopsy systems (Mammotome, EnCor, Eviva, Brevera), Core needle biopsy and fine-needle aspiration (FNA), Breast cancer (all types).
Shares Ultrasound, Hepatocellular carcinoma, Breast cancer (all types).
Shares Ultrasound, Breast cancer (all types).
Shares Biopsy, Ultrasound.
Shares Vacuum-assisted breast biopsy systems (Mammotome, EnCor, Eviva, Brevera), Breast cancer (all types).
Shares Core needle biopsy and fine-needle aspiration (FNA), CT (computed tomography), Hepatocellular carcinoma.