[Opportunistic infections and sarcoidosis]

Area of Science:

• Pulmonology
• Infectious Diseases
• Immunology

Background:

• Opportunistic infections (OIs) are uncommon in sarcoidosis, affecting 1-10% of patients.
• OIs can be a presenting manifestation or occur in patients with pre-existing sarcoidosis.
• Common OIs include aspergillosis, cryptococcosis, and mycobacterial infections.

Purpose of the Study:

• To review the occurrence, risk factors, and clinical implications of opportunistic infections in sarcoidosis.
• To highlight the diagnostic challenges and management strategies for OIs in sarcoidosis patients.
• To emphasize the importance of distinguishing OIs from sarcoidosis exacerbations.

Main Methods:

• Literature review of opportunistic infections in sarcoidosis.
• Analysis of risk factors, including corticosteroid and immunosuppressive therapy (e.g., anti-TNFα).
• Discussion of clinical presentations, diagnostic pitfalls, and management principles.

Main Results:

• Corticosteroids are the primary risk factor for OIs in sarcoidosis, followed by other immunosuppressants.
• Clinical presentations of OIs in sarcoidosis are typically similar to those in other conditions.
• Atypical OI presentations can mimic sarcoidosis exacerbations, leading to potential misdiagnosis and increased immunosuppression.

Conclusions:

• Careful patient history and differentiating factors are essential for accurate diagnosis.
• Misdiagnosis can lead to increased immunosuppression, worsening the opportunistic infection.
• Optimal management requires meticulous assessment to differentiate OIs from sarcoidosis flares.