IgG4-unrelated type 1 autoimmune pancreatitis

Eriko Nakano, Atsushi Kanno, Atsushi Masamune, Naoki Yoshida, Seiji Hongo, Shin Miura, Tetsuya Takikawa, Shin Hamada, Kiyoshi Kume, Kazuhiro Kikuta, Morihisa Hirota, Keisuke Nakayama, Fumiyoshi Fujishima, Tooru Shimosegawa

研究成果: Article査読

3 被引用数 (Scopus)

抄録

A 50-year-old male was referred to our hospital for the evaluation of hyperproteinemia. Fluorodeoxyglucose positron emission tomography revealed high fluorodeoxyglucose uptake in the pancreas, bilateral lacrimal glands, submandibular glands, parotid glands, bilateral pulmonary hilar lymph nodes, and kidneys. Laboratory data showed an elevation of hepatobiliary enzymes, renal dysfunction, and remarkably high immunoglobulin (Ig) G levels, without elevated serum IgG4. Abdominal computed tomography revealed swelling of the pancreatic head and bilateral kidneys. Endoscopic retrograde cholangiopancreatography showed an irregular narrowing of the main pancreatic duct in the pancreatic head and stricture of the lower common bile duct. Histological examination by endoscopic ultrasonography-guided fine-needle aspiration revealed findings of lymphoplasmacytic sclerosing pancreatitis without IgG4-positive plasma cells. Abnormal laboratory values and the swelling of several organs were improved by the treatment with steroids. The patient was diagnosed as having type 1 autoimmune pancreatitis (AIP) based on the International Consensus Diagnostic Criteria. Therefore, we encountered a case of compatible type 1 AIP without elevated levels of serum IgG4 or IgG4-positive plasma cells. This case suggests that AIP phenotypes are not always associated with IgG4.

本文言語English
ページ(範囲)9808-9816
ページ数9
ジャーナルWorld Journal of Gastroenterology
21
33
DOI
出版ステータスPublished - 2015 9 7

ASJC Scopus subject areas

  • 消化器病学

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