Methotrexate-Associated Lymphoproliferative Disorder Presenting as Obstructive Jaundice Due to Pancreatic Involvement. - Okuda Y; Nakamura S; Ishii Y; Tatsukawa Y; Ikemoto J; Miyamoto S; Furukawa M; Nakamura K; Iijima N; Nomura R; Yoshida T; Ichinohe T; et al. (Internal medicine (Tokyo, Japan), 2025)