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Background: Ortho-biological therapies such as platelet-rich plasma and autologous tenocyte implantation injections are hypothesized to introduce cellular mediators such as growth factors into tendons, promoting natural healing.  Methods: This case introduces a 63-year-old female with an extensive history of lateral hip pain and treatment refractory tendinopathy with tearing. She underwent open surgery to repair the gluteus medius tendon, using supplementary autologous tenocyte implantation (ATI) in conjunction with a Celgro (Orthocell, Perth, Australia) collagen scaffold.  Level of evidence: 4  Results: She had normal function in the hip at 12 months. MRI scans post-operatively at 12 months showed a marked reduction in inflammation, an intact tendon and a reduction in atrophic changes in the muscle belly.  Conclusion: Surgical repair of a large degenerate tear of the gluteus medius tendon, augmented with autologous tenocyte implantation in a collagen scaffold led to an excellent patient outcome and MRI findings demonstrated tendon healing with improved tendon structure and reduced inflammation.

Autologous Tenocyte Implantation (ATI) and the Use of Collagen Scaffolds: a Case Report of a Novel Surgical Treatment for Gluteal Tendon Repair