keloid sycosis

例句：

1. 1. Keloid sycosis is a rare condition characterized by the formation of large, hard, and painful scars on the skin.
   瘢痕增生症是一种罕见的状况，表现为皮肤上形成大型、坚硬且疼痛的疤痕。
2. 2. The patient had developed keloid sycosis after a surgical procedure that left him with visible scars.
   这位病人在一次手术之后发展了瘢痕增生症，留下了明显的疤痕。
3. 3. Keloid sycosis can be difficult to treat due to its chronic nature and resistance to conventionaltreatments.
   由于其慢性性质和对常规治疗方法的抵抗力，治疗瘢痕增生症可能很困难。