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68Ga-FAPI has been developed as a tumor-targeting agent as fibroblast activation protein is overexpressed in cancer-associated fibroblasts and some inflammation,such as IgG4-related disease.And it might be more sensitive than FDG in detecting a certain type of inflammations according to our preliminary research.Thus this prospective study is going to investigate whether 68Ga-FAPI PET/CT may be superior for diagnosis, therapy response assessment and follow-up of IgG4-related disease.
Immunoglobulin G4-related disease (IgG4-RD) is an immune-mediated fibroinflammatory condition that is capable of affecting multiple organs. Common forms of presentation include:Type 1 (IgG4-related) autoimmune pancreatitis (AIP),IgG4-related sclerosing cholangitis, major salivary gland enlargement or sclerosing sialadenitis; Orbital disease, often with proptosis and retroperitoneal fibrosis. The involved organs share a number of core pathologic features and striking clinical and serologic similarities, including tumor-like swelling of involved organs, a lymphoplasmacytic infiltrate enriched in IgG4-positive plasma cells, and a variable degree of fibrosis that has a characteristic "storiform" pattern. 68Ga-FAPI has been developed as a tumor-targeting agent as fibroblast activation protein is overexpressed in cancer-associated fibroblasts and it might be a pan-tumor PET agent. Recently we have reported a case of IgG4-related disease revealed by 68Ga-FAPI and 18F-FDG PET/CT which showed FAPI was not more tumor-specific than FDG, furthermore,it might be more sensitive than FDG in detecting a certain type of inflammations-like the pancreatic lesion. Thus this prospective study is going to investigate whether 68Ga-FAPI PET/CT may be superior for diagnosis, therapy response assessment and follow-up of IgG4-related disease.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| 68Ga-FAPI, PET/CT | Experimental | Inject 68Ga-FAPI and then perform PET/CT scan. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| 68Ga-FAPI | Drug | Intravenous injection of one dosage of 74-148 MBq (2-4 mCi) 68Ga-FAPI. Tracer doses of 68Ga-FAPI will be used to image lesions of IgG4-RD by PET/CT. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Metabolic parameters | Total Lesion Glycolysis (TLG) of focal lesions are measured on 68Ga-FAPI PET/CT. | through study completion, an average of 1 year |
| Measure | Description | Time Frame |
|---|---|---|
| Diagnostic value | Diagnostic value of 68Ga-FAPI PET/CT for IgG4-RD in comparison with 18F-FDG PET/CT. | through study completion, an average of 1 year |
| adverse events | Number of participants and kind of adverse events as a measure of safety. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Li Huo, M.D. | Contact | 86-10-69155537 | huoli@pumch.cn | |
| Yaping Luo, M.D. | Contact | 86-10-69157033 | luoyaping@live.com |
| Name | Affiliation | Role |
|---|---|---|
| Li Huo, M.D. | Peking Union Medical College Hospital | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Peking Union Medical College Hospital | Recruiting | Beijing | Beijing Municipality | 100730 | China |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 42129009 | Derived | Liu S, Pan Q, Zhang H, Peng L, Zhang W, Feng Y, Luo Y. [68Ga]Ga-FAPI-04 PET/CT for subtyping and prognostication of IgG4-related disease. EJNMMI Res. 2026 May 13. doi: 10.1186/s13550-026-01451-7. Online ahead of print. |
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| ID | Term |
|---|---|
| D000077733 | Immunoglobulin G4-Related Disease |
| ID | Term |
|---|---|
| D001327 | Autoimmune Diseases |
| D007154 | Immune System Diseases |
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| ID | Term |
|---|---|
| C000707753 | 68Ga-FAPI |
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|
| through study completion, an average of 1 year |
| Disease burden assessement | Correlation between disease burden assessed on 68Ga-FAPI PET/CT and clinical parameters for IgG4-RD. | through study completion, an average of 1 year |
| FAPI expression and SUV | Correlation between FAPI expression and SUV in PET | through study completion, an average of 1 year |
| Prediction value | Prediction value of 68Ga-FAPI PET/CT for IgG4-RD in therapy response assessment | through study completion, an average of 1 year |