Relationship between multicentric reticulohistiocytosis and tuberculosis

Area of Science:

• Rheumatology and Infectious Diseases

Background:

• Multicentric reticulohistiocytosis (MR) is a rare systemic histiocytic disorder.
• Differential diagnosis of MR can be challenging, sometimes overlapping with other granulomatous diseases.

Observation:

• Certain clinical and histopathologic features of MR may mimic or overlap with atypical presentations of tuberculosis (TB).
• A positive tuberculin skin test (TST) can be a crucial indicator in these overlapping cases.

Findings:

• Antituberculous chemotherapy demonstrated potential efficacy in patients presenting with MR-like symptoms and confirmed TB infection.
• This suggests that TB should be considered in the differential diagnosis of MR, especially with positive TST.

Implications:

• Reclassifying some MR cases as unusual TB manifestations could lead to more appropriate and effective treatment strategies.
• Early diagnosis and treatment of associated tuberculosis can significantly improve patient outcomes, preventing disease progression.