Acute Interstitial Nephritis With Karyomegalic Epithelial Cells After Nivolumab Treatment—Two Case Reports

Masaki Ryuzaki, Hirobumi Tokuyama, Kiyotaka Uchiyama, Hideaki Nakaya, Kazuhiro Hasegawa, Kazutoshi Miyashita, Kohnosuke Konishi, Akinori Hashiguchi, Shu Wakino, Hiroshi Itoh