Abstract
A 70-year-old man with epigastric pain was referred to our hospital. Computed tomography and magnetic resonance imaging showed the diffusely enlarged pancreas compared to his normal pancreas 6 months prior to presentation. Serum levels of IgG4 and amylase were normal, while C-reactive protein was slightly elevated. Endoscopic ultrasound-guided fine-needle biopsy of the pancreas revealed acinar–ductal metaplasia with neutrophil infiltration and without infiltration of IgG4-positive plasma cells. After the clinical diagnosis of type 2 autoimmune pancreatitis (AIP), his symptoms spontaneously improved without steroid therapy. Three months later, radiological findings showed improved pancreas size and serological findings. The pathological diagnosis of type 2 AIP using endoscopic ultrasound-guided fine-needle biopsy is challenging, particularly for proving granulocyte epithelial lesions. This was a valuable type 2 AIP case in which the images before, at the time of onset, and at the time of spontaneous remission were evaluated.
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Abbreviations
- AIP:
-
Autoimmune pancreatitis
- ICDC:
-
International Consensus Diagnostic Criteria
- LPSP:
-
Lymphoplasmacytic sclerosing pancreatitis
- GELs:
-
Granulocyte epithelial lesions
- IBD:
-
Inflammatory bowel disease
- IPMN:
-
Intraductal papillary mucinous neoplasm
- MRCP:
-
Magnetic resonance cholangiopancreatography
- CeCT:
-
Contrast-enhanced computed tomography
- MRI:
-
Magnetic resonance imaging
- EUS-FNB:
-
Endoscopic ultrasound-guided fine-needle biopsy
- EUS-FNA:
-
Endoscopic ultrasound-guided fine-needle aspiration
- ADM:
-
Acinar–ductal metaplasia
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All authors contributed to this case report. The first draft of the manuscript was written by Takashi Ito and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Takashi Ito, Tsukasa Ikeura, Kenji Notohara, Masataka Masuda, Koh Nakamaru, Shinji Nakayama, Masaaki Shimatani, Makoto Takaoka, Kazuichi Okazaki, and Makoto Naganuma declare that they have no conflict of interest.
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Ito, T., Ikeura, T., Notohara, K. et al. A case of type 2 autoimmune pancreatitis with spontaneous remission. Clin J Gastroenterol 16, 297–302 (2023). https://doi.org/10.1007/s12328-022-01753-y
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DOI: https://doi.org/10.1007/s12328-022-01753-y