Auer rod-like inclusions in a low-grade B-cell leukemia

Area of Science:

• Hematology
• Oncology
• Pathology

Background:

• Auer rods are diagnostic markers for myeloid neoplasms.
• Their presence in B-cell malignancies is exceptionally rare.
• Chronic lymphocytic leukemia/small lymphocytic lymphoma is a common B-cell malignancy.

Observation:

• A case of low-grade B-cell leukemia, consistent with chronic lymphocytic leukemia/small lymphocytic lymphoma, exhibited numerous intracytoplasmic, needle-shaped, azurophilic rods.
• These inclusions closely resembled Auer rods typically found in myeloid blasts.
• This unusual finding prompted a review of similar cases in the literature.

Findings:

• The study documents a rare instance of Auer rod-like structures in neoplastic B-cells.
• This challenges the traditional association of Auer rods exclusively with myeloid malignancies.
• A comprehensive literature review on Auer rod-like structures in B-cell neoplasms was conducted.

Implications:

• This finding expands the morphological spectrum of B-cell neoplasms.
• It may necessitate re-evaluation of diagnostic criteria in certain hematologic disorders.
• Further research is needed to understand the pathogenesis of these inclusions in B-cell malignancies.