Heterotopic ossification of the shoulder after arthroscopic rotator cuff repair: A case report.

Introduction And Importance: Heterotopic ossification (HO) often arises in response to trauma, prior surgical procedures, neurological injuries, or burns. However, its presentation as a complication of shoulder arthroscopy is uncommon and can sometimes lead to functional impairment. In our study, we report a case of HO complicating rotator cuff repair, along with details of the surgical treatment and subsequent progression.

Case Presentation: We report the case of a 45-year-old man with no medical history, who had undergone a rotator cuff arthroscopic repair of his left shoulder. Despite initial improvements, he developed intense pain and stiffness of the operated shoulder. X-rays revealed an extensive HO. Surgical revision and excision of the ossification, followed by high-dose indomethacin in combination with proton pump inhibitors and specialized physiotherapy, resulted in remarkable improvement in shoulder function.

Clinical Discussion: Studies investigating HO in shoulder arthroplasty have unveiled a diverse range of formation rates, spanning from 15 % to 62 %. Nonetheless, it's noteworthy that the prevalence of HO around the shoulder remains less common in comparison to other anatomical sites, especially in the context of arthroscopic surgical procedures. The exact mechanism and pathophysiology that leads to HO formation remains unknown. It is believed to stem from a combination of multiple factors and is associated with various contributors. Arthroscopic intervention, coupled with high-dose Indomethacin, offers an effective approach for managing HO.

Conclusion: While HO remains an uncommon complication after shoulder arthroscopy, it is crucial for clinicians to consider it in patients experiencing post-surgery stiffness and pain.