%0 Journal Article %T Ultrasound-Proven Severe Synovitis Induced by PD-1 Inhibitor Therapy in a Patient Predisposed to Seronegative Inflammatory Arthritis %A Atsushi Kawakami %A Kojiro Ohba %A Naoki Iwamoto %A Shin-ya Kawashiri %J Archive of "Case Reports in Rheumatology". %D 2019 %R 10.1155/2019/7340692 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6681606/