Immune checkpoint inhibitor-induced radiation recall myositis.

The article describes the case of a 70-year-old man with persistent haematuria diagnosed with bladder cancer and was recommended to undergo a total bladder resection but he refused. Topics discussed include the initiation of chemotherapy with gemcitabine and carboplatin to suppress additional tumour progression, the good response of the bladder cancer to avelumab, and the possible diagnosis of immune checkpoint inhibitor (ICI)-induced radiation recall myositis (RRM).