Hematological Malignancies

Causes & Risk Factors

Risk factors for hematological malignancies vary by specific disease type, though some general patterns are recognized:

•  Prior chemotherapy or radiation therapy for another condition can increase risk of certain leukemias later in life.

•  Certain genetic syndromes — such as Down syndrome — are associated with increased leukemia risk.

•  Environmental and occupational exposures — including benzene — are recognized risk factors for some leukemias.

•  Smoking is associated with increased risk of certain leukemia subtypes.

•  Family history — for some hematological malignancies, a family history modestly increases individual risk.

•  Age — many hematological malignancies become more common with increasing age, though some (such as certain acute leukemias) are also seen in children and younger adults.

Symptoms & When to Test

Symptoms of hematological malignancies often relate to disruption of normal blood cell production, and can develop gradually or, in acute leukemia, quite rapidly.

•  Persistent, unexplained fatigue

•  Easy bruising or unusual bleeding, including nosebleeds or bleeding gums

•  Recurrent or unusual infections

•  Unexplained fever

•  Bone or joint pain

•  Pale skin (suggestive of anemia)

•  Unexplained lymph node swelling

•  Unintentional weight loss

When Should You Consider Testing?

Persistent, unexplained fatigue, easy bruising, recurrent infections, unexplained fever, or bone pain — particularly when occurring together — warrant prompt medical evaluation, which typically begins with a CBC and peripheral blood smear.

Why Tests Are Combined

Diagnosis of hematological malignancy is rarely made from a single test — CBC and peripheral smear provide an initial picture and often the first clue, bone marrow examination confirms the diagnosis and extent of marrow involvement, flow cytometry characterizes the abnormal cell population and determines lineage, and cytogenetics/FISH/molecular testing identify specific genetic abnormalities with diagnostic, prognostic, or treatment significance.

For example, BCR-ABL1 testing is a specific molecular investigation essential to both diagnosing and monitoring chronic myeloid leukemia (CML), since it directly guides the use of targeted tyrosine kinase inhibitor therapy and ongoing treatment response monitoring.

Because the specific combination of abnormal findings determines both the exact diagnosis and the treatment approach, hematological malignancy work-ups are typically built stepwise, with each result guiding whether further testing is needed.

Tests Available at NPL

Most tumor molecular tests, histopathology, IHC, and genetic tests do not require fasting. However, some blood-based investigations ordered alongside cancer testing may have specific preparation requirements. Please follow the instructions provided by your doctor or NPL.

Home Sample Collection

CBC and peripheral blood smear can be arranged through NPL's standard home sample collection service.

Bone marrow examination is a specialist procedure that must be performed by a hematologist at a hospital or clinic — this is not a home collection service.

Once your bone marrow sample is obtained, NPL arranges secure transport to our accredited laboratory for flow cytometry, cytogenetics, FISH, and molecular testing.

For chronic conditions requiring ongoing molecular monitoring (such as BCR-ABL1 testing in CML), follow-up blood samples can typically be arranged via home collection — confirm with your treating hematologist.

When to See a Doctor

•  Persistent, unexplained fatigue

•  Easy bruising or unusual bleeding

•  Recurrent or unusual infections

•  Unexplained fever lasting more than a few days

•  Unexplained bone pain or lymph node swelling

•  Known hematological malignancy with new or worsening symptoms