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First Case Report Of Anca-Associated Vasculitis And Anthracosis Coexistence.

Emrah Doğan1, Ozan Kandemir2, Özge Oral Tapan3

  • 1Department of Radiology.

Journal of Ayub Medical College, Abbottabad : JAMC
|February 26, 2024
PubMed
Summary

This study reports the first case of ANCA-associated vasculitis coexisting with anthracosis. It highlights that anthracotic lung nodules can exhibit high FDG uptake on PET/CT scans, mimicking malignancy.

Keywords:
Anthracosis; Vasculitis; Computed tomography; PET CT

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Area of Science:

  • Pulmonology
  • Rheumatology
  • Nuclear Medicine

Background:

  • Anthracosis, a lung condition from carbon dust, is typically benign.
  • ANCA-associated vasculitis is an autoimmune disease affecting blood vessels.

Observation:

  • A 73-year-old male with ANCA-associated vasculitis presented with anthracotic lung nodules.
  • Radiological imaging showed irregular nodules with high FDG uptake on PET/CT.
  • Histopathology revealed granulomas containing anthracosis particles.

Findings:

  • This is the first reported case of coexisting ANCA-associated vasculitis and anthracosis.
  • Anthracotic granulomas can demonstrate high standardized uptake values (SUV) on PET/CT, potentially confusing diagnosis.
  • The clinical presentation was atypical, with minimal respiratory symptoms.

Implications:

  • The coexistence of vasculitis and anthracosis can lead to misleading PET/CT findings.
  • This case underscores the importance of histopathological examination to differentiate benign anthracotic nodules from malignancy.
  • Further research is needed to explore the role of environmental factors in atypical presentations of lung diseases.