“…Documented cases for late sciatic nerve palsy also have included entrapment of methylmethacrylate fragments, migrating trochanteric wires, dislocation of the hip, hemorrhage, migration of the acetabular cup, and wear debris containing a mass [1,3,5]. Among 50 cases in a meta-analysis of the English literature regarding intrapelvic complications after THA failure, Bach et al [2] identified only three cases of sciatic nerve injury [5,18] and two cases involving intrapelvic mass formation [10,13].…”