Surgical Treatment of Severe Heterotopic Ossification After Total Hip Arthroplasty Over the Last 25 Years: A Systematic Review of the Literature and a New Case Series.

There is insufficient good-quality data on the operative treatment of severe symptomatic HO after THA performed over the last 25 years. Prophylaxis with low-dose irradiation prevented a recurrence. Multicenter studies are needed to determine the optimum timing and prognosis for treatment.