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Your child will be asleep

Bone Marrow Biopsy in Children: — Your Child Will Be Asleep

If your child is having a bone marrow biopsy, the first thing to know is that they will almost certainly be under general anaesthesia — fully asleep, feeling nothing. The procedure that worries you most is the one your child will not experience.

Medically reviewed by Dr. C. Raghavendra Reddy, Medical Oncologist, MBBS (Gold Medal) · DNB · DM (Medical Oncology, Gold Medal) · Last reviewed September 2026

  • General anaesthesia is the standard — Not a special request — it is the expected approach for children in paediatric oncology.
  • Your child will have no memory of it — They fall asleep, the procedure happens, and they wake up with you there.
  • You can usually stay until they are asleep — One parent can typically accompany their child into the anaesthesia room.
  • Results go to the treating haematologist — The haematologist will interpret the findings and discuss them with you in full context.
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In children, bone marrow biopsy is almost always done under general anaesthesia. Your child will be fully asleep, will feel nothing, and will have no memory of the procedure. This is the standard approach in paediatric oncology — not something you need to ask for separately.

Is a bone marrow biopsy done under general anaesthesia for children?

Yes. General anaesthesia is the standard approach for children having a bone marrow biopsy. Your child is completely unconscious before anything begins and wakes up in recovery with no memory of the procedure.

This is not a special accommodation — it is what paediatric oncology units do by default. The anaesthesia team will meet your child beforehand to review their health and ask about allergies.

The procedure itself is brief. Most of the time you spend at the unit is preparation before and monitoring after.

Can a parent stay with the child during the biopsy?

In most paediatric units, one parent can accompany their child into the anaesthesia room and stay until they are fully asleep. You do not need to ask for special permission — this is standard practice.

You will wait nearby while the procedure takes place. A nurse will update you, and you will be brought in as soon as your child is waking up in recovery.

Tell your child in advance that you will be there when they fall asleep and that you will be the first person they see when they wake up. That single reassurance matters more than any other explanation.

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How do you prepare a child for a bone marrow biopsy?

Children cope better when they know what to expect in honest, age-appropriate terms.

Tell them a medicine will make them fall into a deep sleep, they will feel nothing, and you will be there when they wake up. With very young children, avoid the phrase 'going to sleep' — say 'special medicine sleep' instead, because young children can connect that phrase with dying.

Many paediatric oncology units have a child life specialist who can prepare your child before the day. Ask the treating team whether one is available.

What the words in the consent form mean

Bone marrow
The soft, spongy material inside certain bones where blood cells are produced. The biopsy samples it to check whether the cells there are normal in number, shape, and type.
Aspiration
Drawing a small amount of liquid from the bone marrow using a needle. It gives the laboratory a sample of individual cells and is usually done at the same time as the biopsy.
Trephine biopsy
Removing a small core of solid bone marrow tissue. This gives the laboratory a view of the marrow's structure — how the cells are arranged — not just the cells in the liquid.
Posterior iliac crest
The back of the hip bone. This is where the sample is almost always taken in children. You may notice a small dressing over that area when your child wakes up.
General anaesthesia
A medically induced state of complete unconsciousness. Your child is breathing normally, monitored continuously by an anaesthetist, and feels nothing. It is not the same as sedation, in which a child may still be partially aware.
Haematologist
The specialist doctor who will discuss the results with you. Bone marrow biopsy findings are reported to the treating haematologist, not given directly to the family, because the interpretation requires the full picture of your child's case.

Did you know?

Research in paediatric oncology consistently shows that procedural anxiety before a bone marrow biopsy is higher in parents than in children who will be anaesthetised.

Children who receive general anaesthesia have no memory of the procedure. Their first question on waking is almost always the same: 'Is it over?'

Source: Children's Oncology Group supportive care guidance; consistent with SIOPE procedural standards for childhood cancer

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Common questions

Frequently asked questions

Will my child feel any pain during the bone marrow biopsy?

No. Under general anaesthesia your child is completely unconscious and feels nothing during the procedure. Pain at the biopsy site is a recovery concern, not something that happens during the biopsy itself. Your child will be given appropriate pain relief before they are fully awake, and you will be told what to give at home if soreness continues into the following day or two.

How long will the appointment take?

The procedure itself is brief, but the total appointment is longer. You will arrive ahead of time for preparation, the anaesthesia team will assess your child, there is recovery time after, and then a monitoring period before you are cleared to go home. Plan for several hours. Ask the unit coordinator for the expected schedule so you can prepare your child — and yourself — for the day.

When will we get the results of the bone marrow biopsy?

A full bone marrow biopsy report takes several days to return from the laboratory. The sample needs to be prepared, stained, and examined in detail. Some findings may be available sooner, but a complete picture takes longer. Results are discussed with you by the treating haematologist — not given over the phone or at the reception desk — because the interpretation requires the full context of your child's case.

Will my child be sore afterwards?

Some soreness at the biopsy site — usually the back of the hip — is normal for a day or two. It is manageable for most children and does not stop them from walking or ordinary activity. You will be given advice on pain relief before you leave. If the pain is worsening rather than improving after the first 48 hours, or if you notice increasing redness, swelling, or a fever, call the treating team rather than waiting.

My child is terrified. Will knowing they will be asleep actually help?

For most children, yes. Once they understand they will not be awake during the procedure, the fear drops noticeably. The remaining anxiety is usually about the cannula for the anaesthesia rather than the biopsy itself. Most paediatric units apply a numbing cream to the skin beforehand so that the cannula goes in without pain. Ask whether a child life specialist or play therapist can meet your child before the procedure day — even one conversation before arriving at the hospital makes a significant difference for most children.

Can my child eat or drink before the bone marrow biopsy?

No. General anaesthesia requires fasting beforehand, and you will be given specific instructions about when to stop food and fluids. These must be followed exactly. Arriving with a child who has eaten can mean the procedure has to be postponed for safety reasons, which delays results and distresses everyone. Fasting times vary by age and by what was last eaten or drunk — follow the instructions from the unit rather than guidelines you may have read elsewhere.

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