Quotation from: Manual of Surgery

Written by: Alexander Miles and Alexis Thomson

_Dislocation_ of the adjacent joint has been chiefly observed at the
hip; it may result from effusion into the joint and stretching of the
ligaments, or may be the sequel of a purulent arthritis; the signs of
dislocation are not so obvious as might be expected, but it is attended
with an alteration in the attitude of the limb, and the displacement of
the head of the bone is readily shown in a skiagram.