Silica-related rheumatoid arthritis without lung involvement

Area of Science:

• Rheumatology
• Occupational Medicine
• Pathology

Background:

• Rheumatoid arthritis (RA) is a chronic autoimmune disease.
• Silicosis is an occupational lung disease caused by silica dust inhalation.
• RA and silicosis can have overlapping clinical presentations.

Observation:

• A young male presented with severe, recent-onset rheumatoid arthritis.
• Investigations revealed mediastinal lymphadenopathy but no lung involvement.
• Biopsy of mediastinal lymph nodes showed pathological features of silicosis.

Findings:

• This is the first reported case of silicosis manifesting solely in mediastinal lymph nodes in a patient with rheumatoid arthritis.
• The findings challenge the necessity of lung involvement for silica-related arthritis development.

Implications:

• Mediastinal lymphadenopathy in RA patients may warrant investigation for silicosis.
• Silica exposure could potentially trigger RA-like conditions without overt lung disease.
• This case broadens the understanding of silica-related arthropathies.