Leukaemia

Key facts

• Leukaemia is a cancer that begins in the bone marrow, where abnormal white cells multiply out of control and crowd out healthy red cells, platelets, and functional white cells.
• It's grouped as acute or chronic, and by the cell line involved, lymphoid or myeloid, giving four main subtypes with different behaviours and treatments.
• Chemotherapy is the backbone of treatment for many subtypes; cyclophosphamide is a widely used alkylating agent within combination regimens, alongside supportive oncology care.
• Unexplained fatigue, easy bruising, persistent infections, or swollen lymph nodes should prompt medical evaluation.

Symptoms to watch for

Leukaemia often develops quietly at first. As abnormal cells crowd out healthy blood cells, common signs include persistent tiredness, pale skin, easy bruising or bleeding, recurring infections, unexplained weight loss, and swollen lymph nodes. Bone or joint pain can occur when marrow becomes packed with abnormal cells. Acute forms tend to progress over days to weeks; chronic forms can develop so slowly that they are found only on a routine blood test.

How leukaemia is managed

Treatment depends on the subtype, how quickly the disease is progressing, and the patient's overall health. For many subtypes, chemotherapy forms the backbone of care. Cyclophosphamide is a widely used alkylating agent that damages the DNA of rapidly dividing cancer cells and features in combination regimens for several leukaemia types. Supportive oncology care addresses side effects such as anaemia, infection risk, and fatigue alongside the primary therapy.

Acute forms need prompt treatment because the abnormal cells multiply fast. Chronic leukaemias, such as chronic lymphocytic leukaemia, are sometimes monitored closely without immediate treatment if progression is slow, since aggressive therapy can do more harm than good at that stage.

When to see a doctor

Anyone experiencing unexplained fatigue, easy bruising, persistent infections, or swollen lymph nodes should seek medical evaluation promptly. These symptoms have many possible causes, but ruling out leukaemia early makes a real difference to treatment options and outcomes.

This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.