Immune Checkpoint Inhibitor-induced Pancreatitis with Pancreatic Enlargement Mimicking Autoimmune Pancreatitis: A Case Report and Review of the Literature

  • Tanabe Kiyokuni
    Department of Medicine, Division of Gastroenterology, Jichi Medical University, Japan
  • Yokoyama Kensuke
    Department of Medicine, Division of Gastroenterology, Jichi Medical University, Japan
  • Kanno Atsushi
    Department of Medicine, Division of Gastroenterology, Jichi Medical University, Japan
  • Ikeda Eriko
    Department of Medicine, Division of Gastroenterology, Jichi Medical University, Japan
  • Ando Kozue
    Department of Medicine, Division of Gastroenterology, Jichi Medical University, Japan
  • Nagai Hiroki
    Department of Medicine, Division of Gastroenterology, Jichi Medical University, Japan
  • Koyanagi Takahiro
    Department of Obstetrics & Gynecology, Jichi Medical University, Japan
  • Sakaguchi Mio
    Department of Diagnostic Pathology, Jichi Medical University, Japan
  • Nakaya Takeo
    Department of Diagnostic Pathology, Jichi Medical University, Japan
  • Tamada Kiichi
    Department of Medicine, Division of Gastroenterology, Jichi Medical University, Japan
  • Niki Toshiro
    Department of Diagnostic Pathology, Jichi Medical University, Japan
  • Fukushima Noriyoshi
    Department of Diagnostic Pathology, Jichi Medical University, Japan
  • Lefor Alan Kawarai
    Department of Surgery, Jichi Medical University, Japan
  • Yamamoto Hironori
    Department of Medicine, Division of Gastroenterology, Jichi Medical University, Japan

抄録

<p>A 61-year-old woman was administered 35 cycles of pembrolizumab for the treatment of recurrent endometrial cancer, achieving a complete response. She presented with asymptomatic pancreatic enlargement and elevated hepatobiliary enzymes, but amylase and lipase levels were within the normal ranges. Intrapancreatic bile duct stenosis due to pancreatic enlargement was present, mimicking autoimmune pancreatitis on computed tomography performed before the onset of clinical manifestations. A histological examination of a biopsy specimen showed lymphocyte and plasma cell infiltration with dense fibrosis in the stroma. The patient was successfully treated with oral prednisolone. There were no manifestations of recurrent pancreatitis after tapering the prednisolone dose. </p>

収録刊行物

  • Internal Medicine

    Internal Medicine 63 (6), 791-798, 2024-03-15

    一般社団法人 日本内科学会

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