膝盖骨的

Fauchelevent had dislocated his kneepan in his fall.

割风膝盖骨跌脱了。

For knee joint ache: The focus of the knee joint is on the both side of the knee, pointed out by binger in the following pictures.

六、膝关节疼痛患者：膝关节疼痛在膝盖骨两侧，手地方。