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Two cases of hypergranular acute lymphoblastic leukemia
E Bolado-Martínez1, M Vivanco-Jiménez, F García-Ramírez
1Laboratorios Clínicos de Puebla, México.
Summary
Hypergranular acute lymphoblastic leukemia (ALL) is rare, occurring in 1.4% of cases. Patients with this subtype, characterized by early-B cell phenotype and cytoplasmic granules, face a poor prognosis.
Area of Science:
- Hematology
- Oncology
- Cell Biology
Background:
- Acute lymphoblastic leukemia (ALL) is a heterogeneous hematologic malignancy.
- Hypergranular variants of ALL are infrequently reported, with varying prevalence across populations.
Observation:
- This study presents two cases of hypergranular ALL, representing 1.4% of ALL cases over 12 years at a single institution.
- The observed frequency is notably lower than in Caucasian populations.
- Blast cells exhibited an early-B cell phenotype (CD45, CD10, CD19 positive) with PAS-positive cytoplasmic granules.
Findings:
- The two patients diagnosed with hypergranular ALL had a poor prognosis.
- Both patients experienced early mortality following treatment initiation.
- This aligns with previously documented poor outcomes for this specific leukemia subtype.
Implications:
- The findings highlight the rarity and aggressive nature of hypergranular ALL.
- Understanding the immunophenotypic characteristics is crucial for diagnosis.
- Further research into the specific biology and treatment strategies for hypergranular ALL is warranted to improve patient outcomes.