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BOSTON, January 17, 2024 – A rare inflammatory syndrome, VEXAS, is proving to be a diagnostic chameleon, now linked to a first-of-its-kind case of histologically confirmed neutrophilic colitis-inflammation of the colon-along with unusual muscular and pancreatic involvement. This expands the known clinical spectrum of the disease,which often mimics more common autoimmune conditions,leading to delayed or incorrect treatment.
VEXAS Syndrome: Beyond Blood, Into the Gut and Beyond
VEXAS, a relatively newly identified condition, is increasingly recognized for its diverse and often baffling presentation.
- VEXAS (Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic) syndrome is caused by mutations in the MED12 gene.
- The syndrome often presents with systemic inflammation, fever, and blood abnormalities.
- Recent research highlights the potential for VEXAS to affect multiple organs, including the colon, muscles, and pancreas.
- Myelodysplastic features, abnormalities in blood cell production, are frequently observed in VEXAS patients and correlate with poorer outcomes.
What exactly *is* VEXAS syndrome? It’s an autoinflammatory disease-meaning the immune system attacks the body’s own tissues-driven by somatic mutations, meaning they aren’t inherited, in the MED12 gene. These mutations lead to the buildup of vacuoles within cells,triggering a cascade of inflammation. Initially thoght to primarily affect the blood, VEXAS is now understood to be a multi-system disorder.
A New Face for VEXAS: Neutrophilic Colitis
The recent case report details a 73-year-old man who presented with chronic diarrhea, abdominal pain, and weight loss. Colonoscopy revealed neutrophilic colitis,an inflammation of the colon characterized by an abundance of neutrophils,a type of white blood cell. Crucially, genetic testing revealed a MED12 mutation, confirming a diagnosis of VEXAS. Adding to the complexity, the patient also exhibited myositis (muscle inflammation) and pancreatic involvement, both rarely associated with VEXAS.
