Chemotherapy for acute lymphoblastic leukaemia

Transcription

1 Chemotherapy for acute lymphoblastic leukaemia This information is an extract from the booklet Understanding acute lymphoblastic leukaemia. You may find the full booklet helpful. We can send you a copy free see page 10. Contents How the chemotherapy is given Side effects of chemotherapy Contraception during chemotherapy Chemotherapy uses anti-cancer (cytotoxic) drugs to destroy the leukaemia cells. These work by disrupting the production of the leukaemia cells. The drugs circulate all over the body in the bloodstream. However, the chemotherapy drugs can t get into the fluid around the brain and spinal cord (cerebrospinal fluid CSF). This means they need to be injected directly into the fluid in your spine through a lumbar puncture. This is done even if leukaemia cells can t be detected in the CSF, as research has shown that there will almost always be some leukaemia cells in the CSF that need to be destroyed. A lumbar puncture is done under a local anaesthetic that numbs the lower part of your back. It may be uncomfortable, but it only takes a few minutes. Some people may have a headache afterwards. If this happens, let your doctor know so that they can prescribe painkillers for you. You may need to lie flat for a few hours afterwards. We can send you a fact sheet about lumbar punctures. Macmillan and Cancerbackup have merged. Together we provide free, high quality information for all. Questions about cancer? Ask Macmillan Page 1 of 10

2 For people who have just been diagnosed with acute lymphoblastic leukaemia (ALL), it s important to start treatment quickly. Chemotherapy treatment is divided into three different phases: 1. Induction This is the initial intensive phase of treatment, aimed at destroying as many leukaemia cells as possible. It usually achieves a remission of the disease. Common chemotherapy drugs that may be used in this phase include: daunorubicin doxorubicin idarubicin mitoxantrone methotrexate crisantaspase (asparaginase) mercaptopurine cyclophosphamide vincristine. Steroids are often given as part of the chemotherapy treatment to help destroy the leukaemia cells. They are usually given as tablets, for a few days a month. We can send you more information about having steroid therapy to treat ALL. You may also have a drug called allopurinol. This helps to protect the kidneys against damage caused by the increase in uric acid, a waste chemical produced when the leukaemia cells are destroyed. Another drug that helps to prevent damage caused by too much uric acid is rasburicase (Fasturtec ). We can send you more information about rasburicase. Patients who have the Philadelphia chromosome (a particular genetic abnormality within the leukaemia cells) may be given a drug called imatinib (Glivec ). This works by blocking (inhibiting) signals within the leukaemia cells that make them become abnormal and continue to grow and divide. We can send you more information about the Philadelphia chromosome. The induction phase of treatment normally lasts 3 8 weeks. As this is a very intense phase, you ll need to stay in hospital for about four weeks. This is because you re likely to need antibiotics and drips (infusions) of red blood cells and platelets. Page 2 of 10 Questions about cancer? Ask Macmillan

3 2. Intensification (consolidation) After the induction phase, more chemotherapy can be given to increase the chance of destroying any remaining leukaemia cells that can t be seen in the blood or bone marrow. You re likely to receive the same drugs used during the induction phase, plus some of the following: cytarabine etoposide tioguanine (thioguanine). The consolidation phase of the treatment usually lasts for several months. 3. Continuing therapy (maintenance) This treatment phase reduces the risk of the leukaemia coming back at a later stage after treatment has finished. It s a less intensive course of chemotherapy. Common drugs used are mercaptopurine and methotrexate, which are given as tablets, and vincristine, which is given by injection. Steroids are usually continued in short courses. The chemotherapy tablets and steroids can be taken at home. You ll need to go to hospital to have the vincristine. This phase may last for a couple of years and is usually given as an outpatient. You don t usually need to be admitted to hospital unless you develop problems such as an infection. Throughout these three phases of your treatment you ll have regular blood tests to check for leukaemia cells. The fluid that surrounds your brain and spinal cord will also be checked regularly for leukaemia cells. This will be done through lumbar punctures, where your doctor will pass a needle gently into your spine to draw off a tiny sample of the fluid. Your doctor will look at the results of these tests and make changes to your treatment if needed. Instead of standard-dose maintenance chemotherapy, some people will have high-dose treatment with a stem cell transplant. This may be given to increase the chances of a cure. It may also reduce the possibility of a relapse if someone has risk factors that make it more likely that the ALL will come back. High-dose treatment involves being given very high doses of a chemotherapy drug over a few days. If your specialist thinks that high-dose treatment with a stem cell transplant might be necessary or a possible treatment option for you, they will discuss it with you in detail. We can also send you more information about it. Questions about cancer? Ask Macmillan Page 3 of 10

4 If you have standard-dose continuing chemotherapy, your complete chemotherapy course is likely to last for at least two years. If you have high-dose chemotherapy after the induction and intensification phases, the treatment time may be shorter and may finish in less than a year. How the chemotherapy is given The main induction and intensification treatments consist of a combination of three or four drugs given by injection into a vein (intravenously), and some drugs that are given as tablets. Central lines To make having chemotherapy easier and to prevent you from having frequent injections, a narrow, flexible plastic tube (called a central line) can be put into a vein in your chest. It s put in under a general or local anaesthetic. Usually a small cut (incision) is made in the skin over your chest, and the tube is placed under your skin and into a large vein in your neck. The other end of the tube stays outside your body and has a screw cap at the end. The tube can be used to give drugs, fluids, stem cells or bone marrow, and also to collect blood samples Central line is inserted into your chest here The line is tunnelled under your skin The line comes out here Position of a central line You may feel sore and uncomfortable for a couple of days after the line has been put in, but it should then be painless. It can stay in for as long as it s needed, which may be more than two years. The nurses will show you how to look after the central line to prevent blockages or infections. Page 4 of 10 Questions about cancer? Ask Macmillan

5 PICC lines and implantable ports Instead of a central line, a PICC line (peripherally inserted central venous catheter) or an implantable port may be used. A PICC line is a long, thin tube put into a vein in the crook of the arm. An implantable port is a thin, soft plastic tube that s put into a vein in the chest and has an opening (port) just under the skin of the chest or arm. The line is threaded through the vein until the end is near your heart The heart The line comes out just below your elbow Position of a PICC line Your doctor or chemotherapy nurse will explain the procedure to you. You will be given a local anaesthetic before the line is put in. We can send you fact sheets about central lines, PICC lines and implantable ports. Intrathecal chemotherapy As well as by injection into a vein, chemotherapy for ALL is often given directly into the fluid around the brain and spinal cord (cerebrospinal fluid). Giving chemotherapy in this way is known as intrathecal chemotherapy. This is done using a similar procedure to the lumbar puncture (see page 1). Questions about cancer? Ask Macmillan Page 5 of 10

6 After giving you a local anaesthetic, the doctor gently puts a needle into the fluid in the spine. A small amount of fluid is drawn off and the drugs are injected. The drugs will help to destroy any leukaemia cells in the fluid. We can send you a fact sheet about intrathecal chemotherapy. Supportive care During your treatment you will also need treatment for the symptoms that have been caused by a lack of normal blood cells. The reduction in numbers of blood cells may be due to both the leukaemia itself and the chemotherapy. This treatment includes drips (transfusions) of red blood cells and platelets to replace the normal blood cells. You may also need antibiotics to prevent and treat any infections. These can be given through your central line. Side effects of chemotherapy Risk of bruising and bleeding Platelets help the blood to clot. In leukaemia, the number of platelets in your blood is lower than normal, and chemotherapy may temporarily reduce the number even more. This means that you may develop blood spots or rashes on the skin (petichiae), bruise very easily, have nosebleeds or bleed more heavily than usual from even minor cuts and grazes. You may need to have a drip (transfusion) of platelets before your chemotherapy begins, and at times during your treatment, to increase the number of platelets. We can send you a fact sheet about platelet transfusions. If you develop any unexplained bruising or bleeding, such as nosebleeds, blood spots, rashes on the skin or bleeding gums, contact the hospital immediately. Risk of infection While the chemotherapy drugs are acting on the leukaemia cells in your body, they also reduce the number of normal cells in your blood for a while. When the white cells are low (known as neutropenia), you are more likely to get an infection. Page 6 of 10 Questions about cancer? Ask Macmillan

7 During chemotherapy your blood will be tested regularly to check the number of white blood cells. You ll probably be given tablets or other medicines to reduce the risk of developing an infection. If you get an infection, you ll be given medicines to treat it. Most infections are caused by bacteria already in your own body. These don t normally cause infection, but when your immunity is low they are more likely to cause a problem. While you re having chemotherapy it s best to avoid coming into contact with someone who may have an infection. This includes keeping away from large groups of people, where there s more chance of someone having an infection. You may also be advised to be careful about what you eat, to guard against the risk of infection from raw, undercooked or contaminated food. The hospital will tell you how to prepare foods and which foods to avoid. If your temperature goes above 38 C (100.4 F) or you suddenly feel ill, even with a normal temperature, contact your haematology team at the hospital straight away. You may be given injections of a drug called G-CSF (granulocyte-colony stimulating factor). This is a type of protein that stimulates the bone marrow to produce more white blood cells. G-CSF may help reduce the length of time that your white blood cell count is low. The injections are given under the skin (subcutaneously). We can send you fact sheets about G-CSF and avoiding infection when you have reduced immunity. Anaemia If the level of red blood cells (which contain haemoglobin) in your blood is low you may become very tired and lethargic. You may also become breathless. These are all symptoms of anaemia a lack of haemoglobin in the blood. Anaemia can be treated very successfully by blood transfusions. You should quickly feel more energetic after a transfusion and the breathlessness will be eased. We can send you a fact sheet about blood transfusions. Tiredness (fatigue) This is a common side effect of chemotherapy. The fatigue may be due to anaemia, but may also occur as a result of Questions about cancer? Ask Macmillan Page 7 of 10

8 chemotherapy even if your blood count is normal. You may be especially aware of this when you re at home between courses of chemotherapy and for a few months after the treatment. We have booklets with helpful tips on coping with fatigue and breathlessness, which we can send you. Feeling sick Some of the drugs used to treat ALL may make you feel sick (nauseated) and can sometimes cause you to be sick (vomit). There are very effective anti-sickness drugs (anti-emetics) to prevent or greatly reduce nausea and vomiting, which your doctor can prescribe for you. If you still feel sick despite the anti-emetics, let your doctor or nurse know so they can change them for other drugs that may be more effective. We can send you a fact sheet about coping with nausea and vomiting. Sore mouth Some chemotherapy drugs can make your mouth sore and cause mouth ulcers. Regular mouthwashes are important and your nurse will show you how to use these properly. If you don t feel like eating during treatment, you could try replacing some meals with nutritious drinks or a soft diet. Our fact sheet Mouth care during chemotherapy gives information about how to look after your mouth during treatment. Our booklet Diet and cancer has some useful tips on coping with eating problems. Effects on the heart Some of the drugs used to treat ALL may affect the heart muscle. The doses of the chemotherapy drugs are very carefully monitored, and heart tests (such as cardiac echograms) may be done from time to time. Hair loss Hair loss is another common side effect of these drugs. If your hair falls out, you can cover your head by wearing wigs, hats or scarves. Page 8 of 10 Questions about cancer? Ask Macmillan

9 Most patients are entitled to a free wig from the NHS. Your doctor or one of the nurses on the ward can usually arrange a wig for you. If your hair falls out, it will grow back over a period of 3 6 months when the treatment ends. We have a booklet called Coping with hair loss, which you may find helpful. Although they may be hard to deal with at the time, all of these side effects will begin to disappear once your treatment is over. Chemotherapy affects different people in different ways. Many people find that there are times during their treatment when they feel very unwell and tired and have to take things much more slowly. Do as much as you feel like and rest whenever you need to. Contraception during chemotherapy It s not advisable to become pregnant or father a child while taking any of the chemotherapy drugs used to treat ALL, as they may harm the developing baby. It s important to use effective contraception during your treatment and for a few months afterwards. You can discuss this with your doctor or nurse. Condoms should be used during sex for the first 48 hours after chemotherapy in order to protect your partner from any of the drug that may be present in semen or vaginal fluid. Questions about cancer? Ask Macmillan Page 9 of 10

10 More information and support If you have any questions about cancer, ask Macmillan. If you need support, ask Macmillan. Or if you just want someone to talk to, ask Macmillan. Our cancer support specialists are here for everyone living with cancer, whatever you need. Call free on , Monday Friday, 9am 8pm To order a copy of Understanding acute lymphoblastic leukaemia or one of the other booklets mentioned in this information, visit be.macmillan.org.uk To order the fact sheets mentioned in this document, call We make every effort to ensure that the information we provide is accurate but it should not be relied upon to reflect the current state of medical research, which is constantly changing. If you are concerned about your health, you should consult your doctor. Macmillan cannot accept liability for any loss or damage resulting from any inaccuracy in this information or third party information such as information on websites to which we link. Macmillan Cancer Support Registered charity in England and Wales (261017), Scotland (SC039907) and the Isle of Man (604). Registered office 89 Albert Embankment, London, SE1 7UQ REVISED IN SEPTEMBER 2011 Page 10 of 10 Questions about cancer? Ask Macmillan