Current strategies in the diagnosis and management of chronic neutrophilic leukemia

Area of Science:

• Hematology
• Oncology
• Molecular Diagnostics

Background:

• Chronic neutrophilic leukemia (CNL) is a rare myeloproliferative neoplasm characterized by persistent neutrophilia.
• Current diagnostic criteria for CNL can be challenging to apply consistently in clinical practice.
• Understanding the underlying molecular pathogenesis is crucial for improving diagnosis and treatment.

Purpose of the Study:

• To review the diagnostic implications of recent findings in chronic neutrophilic leukemia (CNL).
• To explore the pathogenesis of CNL and identify potential new therapeutic strategies.
• To assess the role of genetic mutations in the diagnosis and management of CNL.

Main Methods:

• Comprehensive literature review of PubMed and Medline databases (1993-2013) and historical publications.
• Focused search using terms "chronic neutrophilic leukemia" and "diagnosis".
• Analysis of clinical, laboratory, and genetic findings related to CNL.

Main Results:

• High-frequency mutations in the granulocyte-colony stimulating factor receptor (CSF3R) have been identified in CNL.
• CSF3R mutations serve as a significant diagnostic marker, enhancing the specificity of World Health Organization (WHO) criteria.
• These mutations are variably applied in routine clinical settings.

Conclusions:

• CSF3R mutation testing can aid in diagnosing clonal myeloid disorders when the cause of neutrophilia is unclear.
• Identifying CSF3R mutations provides a basis for developing genetically informed therapeutic approaches.
• Oncogenic CSF3R mutations indicate sensitivity to specific kinase inhibitors, representing a novel therapeutic direction.