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Updated: Aug 21, 2026

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
Published on: February 8, 2019
[Hemophagocytic syndrome complicating adult's seropositive rheumatoid arthritis]
1Clinique médicale 1, CHU A.-Le-Dantec, Dakar, Sénégal. niangabdou@yahoo.com <niangabdou@yahoo.com>
Introduction:
Macrophage activation syndrome (MAS) is a severe complication of chronic rheumatic diseases, particularly juvenile rheumatoid arthritis. However, MAS is rarely described in adult rheumatoid polyarthritis.
Exegese:
We report a case of MAS complicating a seropositive rheumatoid polyarthritis after 20 years of evolution. Pancytopenia with fever, renal failure and hepatic dysfunction revealed the disease that was confirmed by multiple macrophages and monocytes invading the bone marrow specimen.
Conclusion:
Outcome has been spectacular under corticosteroids.
Insights
Macrophage activation syndrome (MAS) is a rare but severe complication of adult rheumatoid polyarthritis. This case highlights its potential presentation and successful treatment with corticosteroids.
Area of Science:
- Rheumatology
- Hematology
- Pathology
Background:
- Macrophage activation syndrome (MAS) is a life-threatening hyperinflammation.
- It is a known complication of chronic rheumatic diseases, especially in juvenile idiopathic arthritis.
- MAS is infrequently reported in adult rheumatoid polyarthritis.
Observation:
- A case of MAS complicating seropositive rheumatoid polyarthritis after 20 years is presented.
- The patient presented with pancytopenia, fever, renal failure, and hepatic dysfunction.
- Bone marrow biopsy revealed extensive infiltration by macrophages and monocytes.
Findings:
- The findings confirmed a diagnosis of macrophage activation syndrome.
- The bone marrow specimen showed characteristic histopathological changes.
- The patient had a long-standing history of seropositive rheumatoid polyarthritis.
Implications:
- This case underscores the importance of considering MAS in adult rheumatoid polyarthritis patients with unexplained systemic inflammation.
- Early recognition and prompt treatment, such as with corticosteroids, can lead to favorable outcomes.
- Further research into the pathogenesis and management of MAS in adults is warranted.
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