age 34-60 years,average 49 years) with herniation of cervical disc were treated by percutaneous cervical discectomy (PCD) with chemonucleolysis from Jun.1997 to Jun.1998.

• 1998年6月使用国产胶原酶冻干制品，结合经皮切吸术治疗颈椎间盘突出症8例。