Acute promyelocytic leukaemia (APL)
Acute promyelocytic leukaemia (APL) is a type of acute myeloid leukaemia (AML).
What is acute promyelocytic leukaemia (APL)?
Acute promyelocytic leukaemia (also called APL or APL leukemia) is a type of acute myeloid leukaemia (AML). It affects about 6 in 100 (6%) adults with AML.
The tests used for APL are the same as for AML. But your induction and consolidation treatment may include drugs called ATRA (all-trans retinoic acid) or ATO (arsenic trioxide). These are not chemotherapy or targeted therapy drugs. They are sometimes called a differentiating agent.
Your treatment depends on whether you have low-risk, intermediate-risk, or high-risk APL. Risk is based on the level of your white blood cells when you are diagnosed. If you have low or intermediate risk, you usually have a combination of ATRA and ATO. You do not usually need any chemotherapy drugs.
If you have high-risk APL, you may have ATRA. You usually have it with a chemotherapy drug such as idarubicin. This combination is called AIDA.
Or you may have ATRA and ATO together. You usually have maintenance treatment afterwards with ATRA on its own or with chemotherapy for about a year.
ATRA (all-trans retinoic acid)
ATRA is also called tretinoin or Vesanoid®. It is a type of drug called a retinoid, which is like vitamin A.
ATRA helps make the leukaemia cells develop normally. You start taking it straight away. It can reduce leukaemia symptoms quickly. You take it every day as capsules with food. It may be given with chemotherapy or with ATO.
Side effects can include:
- headaches
- dry skin and mouth
- feeling sick (nausea)
- bone pain
- dry eyes.
ATO (arsenic trioxide)
ATO is sometimes called Trisenox®. It damages the leukaemia cells. It is given into a vein through a drip. Side effects can include:
- heart changes
- diarrhoea
- tiredness
- muscle and bone pain
- a high temperature
- raised blood sugar.
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