It affects the cartilage on the back of the kneecap and causes pain and stiffness, especially when going up and down stairs.
Mr Hackett said the defendant then left the house making threats to petrol bomb it and to kneecap his family.
The boy's first taste of warfare was to kneecap a prisoner from the rebel forces.
They made lots of general party noise, which was fine up to about 11 p.m. After that, I wanted to go outside and kneecap them all with my cricket bat.
He lost his leg just above the kneecap last year as a result of a motorcycle accident.
The tendon that connects the kneecap to the thigh muscle (patellar tendon) can be torn if the knee is bent too far back.
Drilled into his knee was a large hole where the bullet had smashed into his kneecap , shattering two bones.
He needs more surgery, this time to graft together the bone in the kneecap .
Would you be afraid to meet him late at night in a dark alley, just in case he was carrying a crowbar and threatening to kneecap you?
He must not enter Railton Terrace in Moston, where he allegedly approached a resident and threatened to have him kneecapped .