malignant melanoma of anus

例句：

1. 1. The patient was diagnosed with a malignant melanoma of the anus.
   这名患者被诊断出患有肛门恶性黑色素瘤。
2. 2. This is the first time I have heard of this condition.
   这是我第一次听说这种病状。
3. 3. The treatment for this disease involves surgery and radiation therapy.
   这种病的治疗包括手术和放疗。