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Several articles support the use of cancellous iliac crest bone grafting in the treatment of clavicle nonunion; however, there is very little literature on the use of tricortical iliac crest grafts in the setting of clavicle nonunion with bone loss. When it has been studied, tricortical grafting has been shown to produce radiologically confirmed union in the clavicle, leaving patients satisfied with the ultimate outcome. We present two cases of clavicle fracture nonunion successfully treated with tricortical interposition bone grafting. In the first case, a 45-year-old female presented with an atrophic left midshaft clavicle fracture nonunion with failed hardware that had undergone two previous attempts at fixation without achieving union. She was treated with a structural interposition iliac crest bone graft with plate fixation and regained full painless function of the arm with radiographic fracture union. In the second case, a 50-year-old male presented after a left midshaft clavicle fracture that had undergone acute stabilization, followed by revision for nonunion that was unsuccessful, resulting in persistent nonunion with bone loss. He was treated with a tricortical iliac crest bone graft and plate fixation. Cultures from the time of surgery did grow Staphylococcus epidermidis and Propionibacterium acnes, and he was treated with intravenous vancomycin for six weeks. The patient's clavicle went on to union and he regained full, painless function by his six-month follow-up visit. These cases demonstrate the use of tricortical interposition bone grafting with compression plating as a viable option for rare instances in which previous surgical intervention has failed to progress a midshaft clavicle fracture to union., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, Williams et al.)

Abscess of the iliopsoas muscle is a rare condition that requires a high degree of clinical suspicion for diagnosis. High mortality rates highlight the need for prompt recognition. We report the case of a 26-year-old man, with a history of intravenous drug use, who was referred from an outside facility with sacral fracture and gluteal abscess. Sacral trauma occurred 3 weeks before presentation, with progressive worsening of buttock pain. The patient was treated with irrigation and débridement of the gluteal abscess. Follow-up MRI revealed a communicating iliopsoas abscess that initially had been undiagnosed. After a prolonged hospital stay requiring additional irrigation and débridement procedures, the patient was discharged in a stable condition. Five-month follow-up has demonstrated no evidence of recurrence of infection. To our knowledge, this is the first reported case of Staphylococcus aureus gluteal abscess with pelvic extension into the iliopsoas secondary to sacral trauma and intravenous drug use., Competing Interests: None of the following authors or any immediate family member has received anything of value from or has stock or stock options held in a commercial company or institution related directly or indirectly to the subject of this article: Mr. Huff, Dr. Gillette, Dr. Stirton, Dr. Peters, and Dr. Ebraheim.