National Registry of IRPF in China

Study Overview
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Brief Summary
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The aim of this study is to establish a nation-wide cohort study of idiopathic retroperitoneal fibrosis (IRPF) in China. Methods: All the patients fulfilling diagnostic criteria of IRPF would be enrolled from multi-centers around China. A online database system has been established. Endpoints: The primary endpoint is to investigate the clinical manifestations of Chinese IRPF patients; the secondary endpoints including the demographic features,laboratory characteristics, immunological tests, imaging and pathological features, in addition, the treatment and prognosis of the disease.

Detailed Description
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This is a multicenter registry study of IRPF patients. Newly diagnosed IRPF patients will be recruited from all over the China. Inclusion criteria: patients with newly diagnosed IRPF will be recruited. Exclusion criteria: patients with secondary forms of retroperitoneal fibrosis or malignancy are excluded. The data will be uploaded through the platform of Chinese Rheumatology Information Platform. Demographic data, initial symptoms, disease duration, history of allergy, and physical examination, organ involvements, laboratory findings, radiological and pathological results, as well as treatment, side effects will be recorded. This study was approved by the Medical Ethics Committee of PUMCH (Beijing, China). All patients will sign informed consent. Statistical Analysis: All parameters are described in the standard summary statistics, including mean, standard deviation, minimum, and maximum. All statistical analyses will be performed by SPSS. Endpoints: The primary endpoint is to investigate the organ involvements of Chinese IRPF patients. The secondary endpoints include the demographic features,laboratory characteristics, immunological tests, imaging and pathological features, in addition, the treatment and prognosis of the disease.

Official Title
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National Registry of Idiopathic Retroperitoneal Fibrosis in China

Conditions
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Idiopathic Retroperitoneal Fibrosis

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Conforming to the diagnostic criteria of IRPF;Definite IRPF must have the following characteristics: (1) The typical finding of Imaging shows retroperitoneal mass, surrounding the abdominal aorta and iliac arteries, with encasement of ureters and/or organ dysfunction; (2) Exclusion of disease progression after standard glucocorticoid treatment; and (3) histopathological findings shows a ﬁbrous tissue with signs of chronic inﬂammation. The inﬂammatory component is comprised of lymphocytes, plasma cells and macrophages. Neutrophils and granulomas are rare ﬁndings. Possible IRPF required (1) and (2), but without histopathological examination. Exclusion Criteria: None of them met the criteria for other autoimmune diseases. None had malignant disease. Secondary forms of RPF related to drugs, infections, malignancies, Erdheim-Chester disease and IgG4-RD, need to be excluded.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Organ involvements of Chinese IRPF patients | To calculate the percentage of organ involvements in at least 500 patients. | 5 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Response rate of treatment with glucocorticoids and immunosuppressants on IRPF in China |  | 5 years | 
| Relapse rate of IRPF patients in China |  | 5 years | 
| The correlation between baseline disease activities and relapse rate. |  | 5 years | 
| Ten year survival rate of patients with IRPF in China. |  | 10 years | 
| The imaging features of involved organs. |  | 3 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Registry; Cohort-study; Idiopathic retroperitoneal fibrosis；