CT Imaging Features of Autoimmune Pancreatitis （Report of 4 Cases）_CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY

Authors：

XU Jun ¹ , SONG Bin ² , WU Bi ² , YANG Yang ² , LI Yingchun. ²

Department of Radiology, The Fourth Provincial Peoples’s Hospital of Sichuan, Chengdu 610016, China;

Corresponding author：

Keywords：

Pancreatitis; Tomography/X-ray computer

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Objective To investigate the CT imaging features of autoimmune pancreatitis (AIP) with report of 4 cases and literature review.
Methods 　The CT imaging data of 4 AIP patients proved on the basis of clinical findings, laboratory tests, response to steroids therapy and follow-up observation were retrospectively collected. Plain CT and contrast-enhanced dual phase CT scan at arterial and portal venous phases were performed for all 4 patients. All imaging data were reviewed, focusing on the shape, size, parenchyma density and enhancement patterns of the pancreas, as well as the biliary and pancreatic ducts, peripancreatic fat, blood vessels, retroperitoneal spaces, lymph nodes, and other positive findings.
Results 　Three patients showed diffuse swelling of the pancreas on CT and 1 had focal enlargement of pancreatic head. Swelled pancreas was hypodense on plain CT images, showed decreased enhancement on artery phase and moderate enhancement on portal venous phase images of contrast-enhanced CT. Capsule-like enhanced rim was found around swelled pancreas in 2 patients. Stricture of distal common bile duct was present in 2 patients, and ERCP showed irregular narrowing of the main pancreatic duct in 1 cases. After steroid therapy, all patients showed significant morphological improvement of the pancreas at follow-up CT examination.
Conclusion 　CT scan reveals certain characteristic imaging findings of AIP, thus it is helpful for the diagnosis of AIP.

Citation： XU Jun,SONG Bin,WU Bi,YANG Yang,LI Yingchun.. CT Imaging Features of Autoimmune Pancreatitis （Report of 4 Cases）. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2007, 14(1): 104-107. doi: Copy

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1. 　Okazaki K, Uchida K, Matsushita M, et al. Autoimmune pancreatitis [J]. Intern Med， 2005; 44(12)∶1215.
2. 　Sahani DV, Kalva SP, Farrell J, et al. Autoimmune pancreatitis: imaging features [J]. Radiology， 2004; 233(2)∶345.
3. 　Sarles H, Sarles JC, Muratore R, et al. Chronic inflammatory sclerosis of the pancreas——an autonomous pancreatic disease? [J]. Am J Dig Dis， 1961; 6∶688.
4. 　Yoshida K, Toki F, Takeuchi T, et al. Chronic pancreatitis ca-used by an autoimmune abnormality. Proposal of the concept of autoimmune pancreatitis [J]. Dig Dis Sci， 1995; 40(7)∶1561.
5. 　Wakabayashi T, Kawaura Y, Satomura Y, et al. Clinical and imaging features of autoimmune pancreatitis with focal pancreatic swelling or mass formation: comparison with so-called tumor-forming pancreatitis and pancreatic carcinoma [J]. Am J Gastroenterol， 2003; 98(12)∶2679.
6. 　Eerens I, Vanbeckevoort D, Vansteenbergen W, et al. Autoimmune pancreatitis associated with primary sclerosing cholangitis: MR imaging findings [J]. Eur Radiol， 2001; 11(8)∶1401.
7. 　Furukawa N, Muranaka T, Yasumori K, et al. Autoimmune pancreatitis: radiologic findings in three histologically proven cases [J]. J Comput Assist Tomogr， 1998; 22(6)∶880.
8. 　Procacci C, Carbognin G, Biasiutti C, et al. Autoimmune pancreatitis: possibilities of CT characterization [J]. Pancreatology， 2001; 1(3)∶246.
9. 　Horiuchi A, Kawa S, Hamano H, et al. ERCP features in 27 patients with autoimmune pancreatitis [J]. Gastrointest Endosc， 2002; 55(4)∶494.
10. 　Horiuchi A, Kawa S, Akamatsu T, et al. Characteristic pancreatic duct appearance in autoimmune chronic pancreatitis: a case report and review of the Japanese literature [J]. Am J Gastroenterol， 1998; 93(2)∶260.
11. 　Irie H, Honda H, Baba S, et al. Autoimmune pancreatitis: CT and MR characteristics [J]. AJR Am J Roentgenol， 1998; 170(5)∶1323.

CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY

CT Imaging Features of Autoimmune Pancreatitis （Report of 4 Cases）

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