title: A case of IgG4-related disease associated with diffuse large B cell lymphoma.
abstract: In June 2008, a 74-year-old male was diagnosed with IgG4-related disease including histologically proven IgG4-related prostatitis, and then followed as an outpatient. In July 2011, cervical, chest, and abdominal computed tomography (CT) revealed right parotid gland swelling and lymph node enlargement of the supraclavicular, mediastinal, left hilar, porta hepatis, and para-aorta. A biopsy of the right parotid gland was performed, and we diagnosed diffuse large B-cell lymphoma (DLBCL). As malignancies are possible complications for patients with IgG4-related disease, we must be careful in the follow-up of IgG4-related disease patients.
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Mitsuyama
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Akiyoshi
authors.initials: A
authors.lastname: Nishio
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Takaoka
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Kazushige
authors.initials: K
authors.lastname: Uchida
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Shimatani
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Toshiro
authors.initials: T
authors.lastname: Fukui
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Ikeura
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Koyabu
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Miyoshi
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Takeo
authors.initials: T
authors.lastname: Kusuda
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Akiko
authors.initials: A
authors.lastname: Kurishima
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Fukui
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Kimi
authors.initials: K
authors.lastname: Sumimoto
authors.affiliation: Division of Hematology, The First Department of Internal Medicine, Kansai Medical University, Hirakata, Japan.
authors.forename: Shinya
authors.initials: S
authors.lastname: Fujita
authors.affiliation: Department of Pathology, Kansai Medical University, Hirakata, Japan.
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Uemura
authors.affiliation: Division of Gastroenterology and Hepatology, The Third Department of Internal Medicine, Kansai Medical University, Hirakata, Japan. Okazaki@hirakata.kmu.ac.jp.
authors.forename: Kazuichi
authors.initials: K
authors.lastname: Okazaki
keywords: Diffuse large B-cell lymphoma (DLBCL); IgG4-related disease; IgG4-related prostatitis; Malignant lymphoma