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Multicentric reticulohistiocytosis
H Kocanaogullari1, H Ozsan, F Oksel
1Department of Medicine, Division of Rheumatology, Ege University, School of Medicine, Izmir, Turkey.
Clinical Rheumatology
|January 1, 1996
Summary
A patient initially diagnosed with rheumatoid arthritis was found to have multicentric reticulohistiocytosis after biopsies revealed destructive joint changes and unusual nodules. This case highlights the importance of biopsy in diagnosing rare conditions presenting with arthritis mutilans-like symptoms.
Area of Science:
- Rheumatology
- Dermatopathology
- Histopathology
Background:
- Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by joint inflammation.
- Arthritis mutilans is a severe, deforming subtype of RA.
- Multicentric reticulohistiocytosis (MRH) is a rare, non-Langerhans cell histiocytosis with systemic manifestations.
Observation:
- A 42-year-old man presented with a five-year history of arthritis mutilans-like joint destruction.
- He also developed nodules on digits, ears, and mucosa, some ulcerated and hemorrhagic.
- Initial diagnosis was RA, but nodule biopsies revealed MRH.
Findings:
- Biopsies confirmed MRH in nodules from the oral mucosa and ear.
- A large olecranon nodule, initially suspected as a rheumatoid nodule, was also diagnosed as MRH.
- The patient exhibited rapidly progressive joint destruction consistent with MRH.
Implications:
- This case underscores the diagnostic challenge in differentiating severe RA from MRH based on clinical presentation alone.
- Histopathological examination of nodules is crucial for accurate diagnosis in cases with overlapping features.
- Early and accurate diagnosis of MRH is essential for appropriate management and to prevent further destructive changes.