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Updated: May 28, 2026

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
Published on: February 8, 2019
[Clinical aspects of Familial Mediterranean fever]
Kiyoshi Migita1, Kazunaga Agematsu
1Clinical Research Center, NHO Nagasaki Medical Center.
Abstract:
Familial Mediterranean fever (FMF) is a hereditary autoinflammatory disease characterized by recurrent and short duration (1-3 days) of fever, and serositis. Based on the nationwide survey of FMF in Japan, the estimated number of Japanese FMF patients is about three hundred. High grade fever was observed in 95.5%, chest pain in 35.8% abdominal pain in 62.7% and arthritis in 31.3% among Japanese FMF patients. AA amyloidosis was confirmed in 5 patients (3.7%). Colchicine was effective in 91.8% of Japanese FMF patients. A significant number of FMF patients exist in Japan, and early diagnosis and treatments should be required to prevent AA amyloidosis.
Insights
Familial Mediterranean fever (FMF) is a rare autoinflammatory disease. In Japan, around 300 patients have FMF, with colchicine proving effective for most, highlighting the need for early diagnosis to prevent complications like AA amyloidosis.
Area of Science:
- Rheumatology
- Genetics
- Internal Medicine
Background:
- Familial Mediterranean fever (FMF) is a hereditary autoinflammatory disorder.
- Characterized by recurrent fever and serositis.
- Prevalence in Japan is estimated at approximately 300 patients.
Purpose of the Study:
- To report findings from a nationwide survey of FMF patients in Japan.
- To describe the clinical characteristics and treatment outcomes.
- To emphasize the importance of early diagnosis and treatment for preventing AA amyloidosis.
Main Methods:
- Nationwide survey of Japanese FMF patients.
- Data collection on symptoms, diagnosis, and treatment.
- Analysis of patient demographics and clinical manifestations.
Main Results:
- High-grade fever (95.5%), abdominal pain (62.7%), chest pain (35.8%), and arthritis (31.3%) were common symptoms.
- AA amyloidosis was confirmed in 3.7% of patients.
- Colchicine demonstrated high efficacy, with 91.8% of patients responding positively.
Conclusions:
- A notable number of FMF patients reside in Japan.
- Early diagnosis and prompt treatment are crucial for managing FMF.
- Effective management, including colchicine therapy, can prevent severe complications such as AA amyloidosis.
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