非ホジキンリンパ腫
In 2007, Kageyama was diagnosed with Non-Hodgkin lymphoma. He underwent chemotherapy and as of spring 2008 was declared cancer-free. He had numerous other health issues including dealing with complications from HIV for decades before his death. He had both hips replaced and walked with a cane. In his last years, he was on dialysis due to a kidney illness.