Blastic mantle cell leukemia: a previously undescribed form

Area of Science:

• Hematology
• Oncology
• Pathology

Background:

• Mantle cell lymphoma (MCL) is a B-cell non-Hodgkin lymphoma.
• The leukemic phase, termed mantle cell leukemia (MCL), is defined by specific lymphocyte counts and morphology.
• While blastic variants of MCL exist, a blastic morphologic variant of MCL has not been previously described.

Observation:

• A 74-year-old male presented with splenic rupture and an elevated white blood cell (WBC) count.
• Peripheral blood examination revealed lymphocytes with blastic morphology.
• Diagnostic workup included flow cytometric immunophenotyping and cytomorphology.

Findings:

• The case presented a rare blastic morphologic variant of mantle cell leukemia.
• Diagnosis was confirmed through immunophenotyping and cytomorphology, identifying the blastic nature in the leukemic phase.
• This represents the first documented instance of a blastic morphologic variant in the leukemic phase of MCL.

Implications:

• This finding expands the known morphologic spectrum of mantle cell leukemia.
• It highlights the importance of considering blastic morphology in the differential diagnosis of leukemic B-cell lymphomas.
• Further research may elucidate the clinical behavior and treatment implications of this rare variant.