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The diagnostic processes for bone marrow cancers vary depending on the type of disease. The answer to this important question, which patients often wonder about, is detailed below:
Acute Leukemias:
Initial suspicion of acute leukemias can be established through a peripheral blood smear, which involves microscopic examination of the blood. However, to determine subtypes such as Acute Myeloid Leukemia (AML) or Acute Lymphoblastic Leukemia (ALL), specialized tests like flow cytometry are performed to identify surface markers of the cells infiltrating the bone marrow.
Chronic Myeloid Leukemia (CML):
For CML diagnosis, it is crucial to demonstrate the presence of the pathological gene called BCR-ABL, resulting from the translocation of chromosomes 9 and 22, or this specific chromosomal abnormality itself. A bone marrow biopsy is generally not mandatory for CML diagnosis; however, it may be performed to assess the patient's risk group, staging, and clinical course.
Chronic Lymphocytic Leukemia (CLL):
The peripheral blood smear test is used in the diagnosis of CLL. Suspicion arises from an increase in mature lymphocytes and the presence of 'smudge cells' (basket cells) which appear when these lymphocytes are crushed during the smear preparation. Definitive diagnosis is confirmed by flow cytometry, a test that identifies the surface antigens or identity markers of these cells. A bone marrow biopsy is not mandatory for CLL diagnosis.
Multiple Myeloma:
A bone marrow biopsy is essential for the diagnosis of Multiple Myeloma. The presence of a certain percentage of abnormal plasma cells in the bone marrow is a diagnostic criterion. Furthermore, demonstrating the abnormal proteins produced by these abnormal plasma cells in blood and urine plays a vital role in both diagnosis and monitoring treatment response.
How Is Bone Marrow Cancer Diagnosed?
Acute Leukemias:
Initial suspicion of acute leukemias can be established through a peripheral blood smear, which involves microscopic examination of the blood. However, to determine subtypes such as Acute Myeloid Leukemia (AML) or Acute Lymphoblastic Leukemia (ALL), specialized tests like flow cytometry are performed to identify surface markers of the cells infiltrating the bone marrow.
Chronic Myeloid Leukemia (CML):
For CML diagnosis, it is crucial to demonstrate the presence of the pathological gene called BCR-ABL, resulting from the translocation of chromosomes 9 and 22, or this specific chromosomal abnormality itself. A bone marrow biopsy is generally not mandatory for CML diagnosis; however, it may be performed to assess the patient's risk group, staging, and clinical course.
Chronic Lymphocytic Leukemia (CLL):
The peripheral blood smear test is used in the diagnosis of CLL. Suspicion arises from an increase in mature lymphocytes and the presence of 'smudge cells' (basket cells) which appear when these lymphocytes are crushed during the smear preparation. Definitive diagnosis is confirmed by flow cytometry, a test that identifies the surface antigens or identity markers of these cells. A bone marrow biopsy is not mandatory for CLL diagnosis.
Multiple Myeloma:
A bone marrow biopsy is essential for the diagnosis of Multiple Myeloma. The presence of a certain percentage of abnormal plasma cells in the bone marrow is a diagnostic criterion. Furthermore, demonstrating the abnormal proteins produced by these abnormal plasma cells in blood and urine plays a vital role in both diagnosis and monitoring treatment response.