一个病人先前有髌股切除手术史。

One patient had a previous patellectomy.

youdao

对晚期患者则应采用人工髌股关节置换术，治疗优良率达86.3%。

In late stage, patellofemoral replacement is recommended. The excellent-effective rate is 86.3%.

youdao

对晚期患者则应采用人工髌股关节置换术，治疗优良率达86.3%。

In late stage, patellofemoral replacement is recommended. The excellent-effective rate is 86.3%.

youdao