Abstract

VEXAS syndrome is a rare condition characterized by somatic mutations in the ubiquitin-like modifier activating enzyme 1 (UBA1) gene and a constellation of clinical/morphologic findings, including the presence of cytoplasmic vacuoles within bone marrow hematopoietic cells. In this report, we present a case of a male patient diagnosed with VEXAS-associated myelodysplastic syndrome following the detection of a non-canonical UBA1 p.Gly477Ala variant whose bone marrow biopsy revealed a conspicuous absence of cytoplasmic vacuolization in hematopoietic cells. This case prompts a comprehensive review of the existing literature on the significance and pathobiology of vacuolization in the context of VEXAS and UBA1 mutations.

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