Cytogenetic analysis of 51 patients with chronic myeloid leukemia

Area of Science:

• Hematology
• Cytogenetics
• Oncology

Background:

• Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm.
• The Philadelphia chromosome (Ph1) is a hallmark genetic abnormality in CML.
• Understanding the spectrum of genetic abnormalities in CML is crucial for diagnosis and prognosis.

Purpose of the Study:

• To investigate the frequency and types of chromosomal abnormalities in patients with chronic myeloid leukemia (CML).
• To characterize the prevalence of the Philadelphia chromosome (Ph1) and associated structural abnormalities in a cohort of CML patients.

Main Methods:

• Karyotyping and cytogenetic analysis were performed on bone marrow samples.
• Patient data, including clinical diagnosis and genetic findings, were retrospectively reviewed.
• Genetic follow-up was conducted for a subset of patients with Ph1-positive CML.

Main Results:

• The Ph1 translocation was detected in 43 out of 51 (84%) CML patients.
• Among Ph1-positive patients, 19 (45%) presented with additional structural chromosomal abnormalities.
• Complex translocations were identified in 5 (12%) of the Ph1-positive CML cases.
• Genetic follow-up was performed on 28 patients with Ph1-positive CML.

Conclusions:

• The Ph1 translocation is highly prevalent in CML.
• A significant proportion of Ph1-positive CML cases are associated with other complex chromosomal aberrations.
• These findings highlight the genetic heterogeneity within CML and may have implications for disease classification and management.