Advice after your nerve block for surgery
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What is a Core Biopsy?
The investigation you have just had is a core biopsy of the breast. You have been given a local anaesthetic injection to numb the skin, a small cut has been made and, through this cut, at least 3 samples or cores of tissue have been removed (biopsied) and sent to the laboratory for the Pathologist to examine them under a microscope.
Are there any side-effects?
The most common side-effect is some bleeding and bruising around the area. We try to reduce this by applying firm hand pressure after the biopsy before a sterile dressing is applied. If the area should bleed again, apply pressure yourself. This should be enough; however, should you have any serious concerns contact your GP or 111 who will advise you.
Some bruising is expected and will settle within a few days. More severe side-effects such as infection are extremely rare.
What do I do when I get home?
The local anaesthetic will wear off after about half an hour and you may experience some discomfort in the breast. We usually advise to take simple pain killers such as paracetamol. Try not to have aspirin or ibuprofen type medicines as these can worsen any bruising.
Wearing a firm bra, such as a sports bra, overnight may help.
Hot or cold compression to the area can also be helpful.
Keep the dressing dry for 24-48 hours, after which you can remove it.
Please avoid any vigorous exercise or heavy lifting to allow the small cut to heal. Driving and using a computer are fine.
When will I know the result?
The biopsy samples require careful preparation before they are ready to be looked at under the microscope. The process can take up to 2 weeks before a result is available. An appointment for your biopsy results will be arranged by our administrative team.
These biopsies are not always conclusive. Your Consultant may wish to repeat it and will discuss the options with you.
Contact us
If you have any queries relating to this information, please contact the Cancer care service.
About this information
Service:
Cancer care
Reference:
Q/001
Approval date:
1 May 2025
Review date:
1 May 2027
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Important note
This page provides general information only. It is developed by clinical staff and is reviewed regularly every 3 years for accuracy. For personal advice about your health, or if you have any concerns, please speak to your doctor.