Long-term results after isolated iliac wing fractures.

Introduction: Isolated iliac wing fracture is a rare pelvic fracture that is considered benign in the literature. As there is a complete lack of information on function and quality of life in patients with this injury, the primary aim of this study was to evaluate the long-term functional results, and secondly to evaluate the patients' clinical function and fracture healing.

Patients And Methods: All patients treated in Oslo University Hospital, Ullevaal (OUH-U), the Norwegian National Pelvic Service, in the time period 2006-2016 were included. Nine of 13 eligible patients (69%) were evaluated by the Patient Reported Outcome Measures (PROM); EQ-5D-3L and Majeed Score. For the secondary outcomes, the patients were clinically examined for Range of Motion (ROM) in the hips, pain, muscular function and nerve deficiencies. Finally, the patients underwent X-rays (AP-view and iliac and obturator oblique views).

Results: All patients were injured in high-energy trauma with severe associated injuries. Five patients were operated and four received conservative treatment. At the time of follow-up (median seven years after injury), the mean EQ-5D VAS was 84, and the mean Majeed score was 87. Two out of nine reported moderate level of pain, three reported mild pain, and the rest reported no pain. Six patients were still working, two were retired, and the last one was receiving disability benefit of other reasons than the iliac fracture. One patient had difference in range of external rotation of >10° between the hips, while the rest had no differences in ROM. The follow-up X-rays showed healed fractures in all the patients.

Conclusion: Patients with isolated iliac wing fractures seem to have a good general state of health, scoring high on the PROMs, with minor and insignificant clinical sequela. This original finding is in accordance with the general assumption amongst pelvic surgeons that the injury is a benign one.