3 point symmetry is not disturbed in which fracture?
Weak posterior capsule may disrupt three point bony relation by promoting subluxation or dislocation of elbow. Fracture ulna on the upper end i.e. involving olecranon also disturb three point symmetry, but the radius has nothing to do with three point bony relationship and so it will not disturb three point bony symmetry. Ref: Apley's 8/e, Page 596-609.
Fracture ulna only
Fracture radius only
Fracture of radius and ulna both bones of forearm
Weak posterior capsule