For Patients & General Readers
Acute leukaemia is a fast-growing cancer of the blood and bone marrow, where immature white blood cells (called blasts) multiply uncontrollably. It can affect people of all ages, but is more common in children and older adults. Early recognition of its symptoms is crucial for prompt diagnosis and treatment to improve outcomes.
Clinical Overview
Acute leukaemias are aggressive haematological malignancies characterized by the rapid proliferation of immature myeloid or lymphoid blasts, leading to bone marrow failure and extramedullary infiltration. Clinical presentation is often acute and non-specific, reflecting cytopenias and organ dysfunction.
Clinical Presentation
- Bone marrow failure leading to pancytopenia (anaemia, thrombocytopenia, neutropenia)
- Symptoms related to infiltration of extramedullary sites (e.g., lymphadenopathy, hepatosplenomegaly, CNS involvement)
- Constitutional symptoms (fever, fatigue, weight loss)
- Rapid onset and progression of symptoms over days to weeks
- Increased susceptibility to infections due to neutropenia
- Bleeding manifestations due to thrombocytopenia
Signs & Symptoms
Symptoms (Patient-Reported)
- Fatigue and weakness
- Recurrent infections or prolonged recovery from illness
- Easy bruising or bleeding (e.g., nosebleeds, gum bleeding, heavy menstrual periods)
- Fever or chills
- Unexplained weight loss
- Bone or joint pain
- Shortness of breath
Signs (Clinician-Observed)
- Pallor (due to anaemia)
- Petechiae or purpura (due to thrombocytopenia)
- Fever (often without a clear source, due to infection or leukaemic infiltration)
- Lymphadenopathy (enlarged lymph nodes)
- Hepatosplenomegaly (enlarged liver and spleen)
- Tenderness over bone
Differential Diagnoses
| Condition | Distinguishing Feature |
|---|
| Myelodysplastic Syndromes (MDS) | MDS typically presents with chronic cytopenias and a lower percentage of blasts in the bone marrow, with a slower progression than acute leukaemia. |
| Aplastic Anaemia | Aplastic anaemia is characterized by pancytopenia due to bone marrow failure but lacks the significant blast population seen in acute leukaemia. |
| Viral Infections (e.g., EBV, CMV) | Viral infections can cause fever, lymphadenopathy, and sometimes cytopenias, but typically resolve spontaneously and lack the characteristic leukaemic blasts. |
| Other Malignancies (e.g., Lymphoma, Solid Tumours with Marrow Metastasis) | While these can cause constitutional symptoms and cytopenias, the presence of leukaemic blasts in peripheral blood or bone marrow is diagnostic of leukaemia. |
| Immune Thrombocytopenic Purpura (ITP) | ITP primarily causes isolated thrombocytopenia with bleeding symptoms, without the other cytopenias or leukaemic blasts. |
| Nutritional Deficiencies (e.g., Vitamin B12, Folate Deficiency) | These can cause anaemia and pancytopenia, but bone marrow examination will show megaloblastic changes and no leukaemic blasts. |
Red Flags — Seek Immediate Care
- Suspected acute leukaemia based on clinical presentation and initial blood counts (e.g., significant pancytopenia with circulating blasts)
- Febrile neutropenia (fever in a patient with neutrophil count < 0.5 x 10^9/L)
- Evidence of disseminated intravascular coagulation (DIC)
- Neurological symptoms suggestive of CNS leukaemia (e.g., headache, cranial nerve palsies, seizures)
Key Investigations
- Complete Blood Count (CBC) with differential and peripheral blood smear examination
- Bone marrow aspiration and biopsy with cytogenetics, immunophenotyping (flow cytometry), and molecular studies
- Coagulation studies (PT, PTT, INR, fibrinogen)
- Renal and liver function tests
- Lactate dehydrogenase (LDH) and uric acid levels
- Imaging studies (e.g., chest X-ray, CT scans) if extramedullary involvement is suspected
Management Overview
Management of acute leukaemia is primarily chemotherapy-based, aiming for remission induction followed by consolidation and maintenance therapy. Supportive care, including blood product transfusions, antibiotics for infections, and management of tumour lysis syndrome, is critical. Stem cell transplantation may be considered for high-risk patients.
Disclaimer: This article is for educational purposes only and does not constitute medical advice.
Always consult a qualified healthcare professional for diagnosis and treatment.
TruelyserMD does not replace clinical judgement.