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Case Reports

A Curious Case of Morphologically Deceptive Pediatric B-Lymphoblastic Leukemia with Granular “Blebbed” Blasts and DLBCL-Like Biopsy Findings

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Pages 98-102 | Received 27 Jan 2022, Accepted 02 Mar 2022, Published online: 14 Mar 2022
 

Abstract

Background: B-cell acute lymphoblastic leukemia is known for heterogeneous blast morphology. Cytoplasmic granules and blebs have both been described, but not together, in lymphoblasts. Case presentation: A 7-year-old boy presented with fever, abdominal distension for 3 weeks, with hepatosplenomegaly. Investigations revealed pancytopenia, peripheral smear showing 21% blasts of varying size, displaying cytoplasmic blebbing and granulation. Marrow aspirate was hemodilute, 10% cells showed dim to moderate expression of CD45, CD10, CD19, HLA-DR confirming B-ALL. Megakaryocytic markers (CD41, CD61) were negative. Marrow biopsy showed a focus of large atypical cells displaying increased nuclear-cytoplasmic ratio, vesicular nuclear chromatin and macronucleoli, reminiscent of diffuse large B-cell lymphoma, cells strongly expressing PAX5, CD19, CD20, and bcl-2.The child was put on standard induction therapy. No blasts were detected in subsequent peripheral smears. Conclusion: To the best of our knowledge, this is the first case of pediatric B-ALL displaying granular “blebbed” blasts.

Disclosure statement

The authors report there are no competing interests to declare.

Funding

The author(s) reported there is no funding associated with the work featured in this article.

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