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Area of Science:

  • Nephrology
  • Rheumatology
  • Oncology

Background:

  • Anti-neutrophil cytoplasmic antibody-associated vasculitides (AAV) are multisystem disorders characterized by small vessel inflammation and pauci-immune glomerulonephritis.
  • Delayed diagnosis and treatment of AAV can lead to irreversible renal damage.
  • AAV relapses can mimic infections or malignancy, complicating patient management.

Purpose of the Study:

  • To present a case of a rare anterior mediastinal mass as a complication of myeloperoxidase-positive vasculitis.
  • To underscore the diagnostic challenges in AAV, particularly when symptoms are vague or mimic other conditions.
  • To emphasize the importance of multimodality imaging and a multidisciplinary approach in managing AAV.

Main Methods:

  • Case report of a young male with pre-existing myeloperoxidase-positive vasculitis.
  • Clinical presentation with subacute symptoms.
  • Diagnostic workup including exclusion of other etiologies and tissue sampling.
  • Multimodality imaging.

Main Results:

  • Anterior mediastinal mass identified as a complication of vasculitis.
  • Prompt immunosuppression escalation initiated after diagnosis.
  • Tissue sampling excluded alternative diagnoses like infection or malignancy.

Conclusions:

  • Mediastinal masses can be a rare complication of AAV.
  • Diagnostic challenges in AAV necessitate a high index of suspicion and comprehensive evaluation.
  • Multidisciplinary collaboration and advanced imaging are crucial for timely and accurate AAV diagnosis and management.