Chronic leukaemia: an African experience

Area of Science:

• Hematology
• Oncology
• Epidemiology

Background:

• Chronic leukaemias, including chronic granulocytic leukaemia (CGL) and chronic lymphocytic leukaemia (CLL), are significant hematologic malignancies.
• Understanding population-specific variations in disease presentation and outcomes is crucial for effective management.

Purpose of the Study:

• To describe the clinical features, incidence, and survival patterns of chronic leukaemias in a Nigerian cohort.
• To compare these findings with those reported in Caucasian populations.

Main Methods:

• Retrospective analysis of 118 patients with chronic leukaemias (75 CGL, 43 CLL) treated between 1964 and 1982.
• Comparison of clinical presentation, laboratory findings, and survival data with existing Caucasian series.

Main Results:

• CLL was less common than CGL in this Nigerian cohort, contrasting with Caucasian incidence.
• Patients presented with more massive splenomegaly, severe anaemia, and a higher proportion of immature cells in CGL.
• Younger peak-age incidence for CGL (20-40 years) was observed.
• Survival duration for both CGL and CLL was lower than in Caucasian series.
• Significant negative correlation between spleen size and survival in CGL; association between high white cell count and poor survival in CLL.

Conclusions:

• Chronic leukaemias in Nigeria exhibit unique epidemiological and clinical characteristics compared to Western populations.
• Late presentation, endemic malaria, and hypersplenism may contribute to observed differences.
• Lower survival rates underscore the need for improved diagnostic and treatment strategies in this region.