Hepatic Decompensation Caused by IgG4-positive Plasma Cell Infiltration Mimicking Sclerosing Cholangitis, Who Achieved a Four-year Survival by Glucocorticoid Treatment. - Yamashiki N; Suwa K; Yamashina M; Yoshida K; Seki T; Shimatani M; Ikura Y; Uemura Y; Okazaki K; Naganuma M (Internal medicine (Tokyo, Japan), 2026)