[Differential diagnosis of systemic vasculitis and tuberculosis]

Area of Science:

• Pulmonology
• Infectious Diseases
• Rheumatology

Background:

• Systemic vasculitis and tuberculosis can present with overlapping pulmonary symptoms, complicating differential diagnosis.
• Accurate diagnosis is essential for appropriate patient management and treatment.

Purpose of the Study:

• To evaluate the diagnostic utility of microbiology, X-ray, and bronchoscopy in differentiating systemic vasculitis and pulmonary tuberculosis.
• To report a case of focal pulmonary tuberculosis in a patient with rheumatoid arthritis.

Main Methods:

• Review of diagnostic procedures in 52 patients with suspected systemic vasculitis or tuberculosis.
• Inclusion of X-ray studies, bronchoscopy with bronchoalveolar lavage, and transbronchial lung biopsy histology.
• Microbiological examination for Mycobacterium tuberculosis.

Main Results:

• Microbiology, X-ray, and bronchoscopy provided high diagnostic value in differentiating the conditions.
• Focal pulmonary tuberculosis was identified in a rheumatoid arthritis patient during the S(II) infiltration phase.
• Mycobacterium tuberculosis was confirmed bacteriologically.

Conclusions:

• Integrated diagnostic approaches including bronchoscopy and biopsy are highly informative for distinguishing pulmonary tuberculosis from systemic vasculitis.
• Prompt diagnosis and specific antituberculous therapy are effective in managing pulmonary tuberculosis, even in patients with autoimmune conditions like rheumatoid arthritis.