The patient is a 36-year-old male who underwent two successive surgical resections for prostate fibrosarcoma, which was traumatic, painful, and soon recurred. Pelvic CT scan at the time of admission: pain in the perineum was obvious. CT scan at the end of minimally invasive oncology department of Shandong Qianfoshan Hospital, Liu Yuanshui argon helium knife surgical treatment: all the tumors were frozen necrotic and darkened in color, and the pain was significantly reduced after the surgery.