Discrepant immunophenotypic characteristics between the lymph node and bone marrow in two mixed-phenotype acute...

Area of Science:

• Hematology
• Immunology
• Oncology

Background:

• Immunophenotypic profiling is crucial for diagnosing hematological malignancies, typically showing consistency across different anatomical sites.
• Acute leukemia diagnosis commonly relies on consistent immunophenotypes in peripheral blood, bone marrow, or lymph nodes.

Observation:

• This study reports two Korean patients with acute leukemia exhibiting discordant immunophenotypes between bone marrow specimens and cervical lymph node biopsies.
• Specific discrepancies were noted in myeloperoxidase (MPO) and CD3 expression.

Findings:

• Immunophenotypic analysis revealed differing results between bone marrow and lymph node biopsies in these acute leukemia cases.
• Discordant immunophenotypes, though rare, can occur in a subset of leukemia patients involving multiple anatomical sites.

Implications:

• The clinical significance of this immunophenotypic disparity in acute leukemia remains to be determined.
• Integrating findings from various diagnostic sources, including bone marrow and biopsy studies, is essential for accurate diagnosis and treatment planning in leukemia.
• Recognizing potential immunophenotypic discrepancies is vital for optimizing patient management in hematological malignancies.