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Learn a revolutionary proactive surgical treatment for avascular necrosis in sickle-cell patients.
Case Report | Volume 6 | Issue 5 | JOCR November-December 2016 | Page 62-64| Andrew M Steffensmeier, Karen Kirkham, John M Wiemann. DOI: 10.13107/jocr.2250-0685.634
Authors: Andrew M Steffensmeier, Karen Kirkham, John M Wiemann
Department of Orthopedic Surgery, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, United States,
Department of Internal Medicine, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, United States.
Address of Correspondence
Dr. Andrew M Steffensmeier,
Department of Orthopedic Surgery, 240 East Drive, Dayton, Ohio – 45419, United States.
Introduction: Avascular necrosis (AVN) of the femoral or humeral heads in patients with sickle cell anemia is a common and painful condition. There is currently no gold standard treatment protocol for this condition. Typically, the pain is managed with narcotics and activity restriction until there has been collapse of the subchondral bone with a degree of arthrosis sufficient to warrant total joint arthroplasty. This method entails prolonged pain for the patient and decreases the ability to function occupationally and recreationally.
Case Report: A 51-year-old African-American woman with a history of sickle cell anemia presented for the evaluation of significant bilateral shoulder pain that was confirmed to be AVN via radiographs and magnetic resonance imaging of both her humeral heads without joint collapse. She tried and failed conservative management with physical therapy and optimization of sickle cell treatment with pain medications for years, so she desired surgical management. Arthroscopically assisted core decompression of her humeral heads with synthetic grafting was performed in an attempt at joint preservation.
Conclusion: This report demonstrates a technique of staged decompression of necrotic bone in the bilateral humeral heads with synthetic bone grafting to determine if this could function as a joint preservation strategy. This procedure was considered successful to alleviate the patients’ pain in both of her arms. The application of this procedure is significant because it could be used in various future medical joint preservation cases for a wide range of patients.
Keywords: Synthetic bone graft, sickle cell anemia, humeral head.
Avascular necrosis (AVN) of the femoral and humeral heads is a frequent and debilitating finding in many patients with sickle cell anemia [1, 2, 3, 4]. The standard treatment is observation with symptomatic pain control until the arthrosis has progressed to the point requiring total joint arthroplasty [5, 6, 7, 8]. There is a lack of published research with regard to joint preservation strategies in this patient population with new data starting to be published on the outcomes of core decompression and arthroplasty on atraumatic osteonecrosis . This case illustrates a patient with bilateral humeral head AVN in which staged decompression of the necrotic bone with synthetic bone grafting was performed as a joint preservation strategy. It is our goal to delay end-stage arthrosis and cartilaginous degeneration with early intervention.
A 51-year-old African-American woman with a history of sickle cell anemia presented for the evaluation of significant bilateral shoulder pain that was interfering with her activities of daily living and requiring narcotic medication for pain control. The pain and disability had been increasing progressively over several years and was recalcitrant to physical therapy. Radiographs and magnetic resonance imaging (MRI) confirmed AVN of her humeral heads without joint collapse (Fig. 1).
Staged surgery was then performed approximately 4-month apart using the identical technique on both shoulders. Our standard perioperative protocol for sickle cell patients was utilized. This consists of admission the evening before surgery to the internal medicine service with acquisition of routine blood work, intravenous hydration, and preoperative blood transfusion as indicated based on hemoglobin level . Surgery was performed in the beach chair position with the c-arm coming in perpendicular to the patient. Diagnostic arthroscopy was performed to evaluate for intra-articular pathology and confirm that there was no significant chondromalacia, which would negate the benefits of the joint preservation procedure. In this case, arthroscopy revealed small partial thickness articular sided supraspinatus tears that were debrided but no visible chondral damage was present. Upon probing, the cartilage was quite soft over the areas of AVN noted on MRI. Under fluoroscopic guidance, a guide wire was directed into the center of the region of AVN, which was done via a small deltoid splitting approach laterally. The arthroscopic probe was placed in the center of the most depressible cartilage region on the head and utilized fluoroscopically to guide pin placement. Once the guide wire was in the center of the defect, an expandable reamer was utilized and the necrotic bone was removed (Fig. 2). The arthroscope is critical in this stage to allow complete extraction of necrotic subchondral bone while ensuring no penetration of the cartilage. After full decompression was performed, synthetic bone graft (PRO-DENSE, Wright Medical) was injected under fluoroscopy and direct visualization. Given the immediate structural integrity of the graft, maximal removal of necrotic segments was attempted. Care was taken under fluoroscopic guidance not to penetrate the articular surface and no cartilaginous defects were encountered. For both procedures, the standard sickle cell protocol was followed with overnight admission for intravenous hydration followed by discharge with 2 weeks of deep venous thrombosis (DVT) chemoprophylaxis. She was allowed activity as tolerated and physical therapy initiated 2 weeks after each surgery. At 8-month follow-up from the index procedure, she is asymptomatic with a full range of motion on the first shoulder and some mild residual stiffness in the second shoulder (4-month follow-up). Radiographs demonstrate incorporation of the bone graft without evidence of joint collapse or further AVN (Fig. 3).
There are no published articles on surgical shoulder joint preservation in sickle cell anemia to the authors knowledge. In this report, we show a potential method to mitigate this process and prevent or delay the need for total joint arthroplasty with early intervention. Synthetic grafting with an injectable calcium sulfate and calcium phosphate composition (PRO-DENSE) has been shown to be effective in allowing relatively rapid bone regrowth in the setting of femoral head AVN [10, 11]. Removal of necrotic bone back to healthy vascularized bone with interposition of a structurally strong osteoconductive substrate allows for gradual revascularization and re-ossification of the region. While decompression and grafting will not change the underlying sickle cell disease process, it is our hope to provide improved the quality of life for these patients. Further study is required to demonstrate the long-term efficacy of joint preservation strategies in the humeral heads of sickle cell patients with humeral head AVN before evidence of cartilaginous damage. In terms of indications and contraindications or inclusion and exclusion criteria, we do not feel that joint preservation strategies would be effective after the onset of subchondral collapse, rather in the setting of MRI-confirmed symptomatic AVN with intact cartilage. The risk profile of any surgical intervention in the setting of sickle cell anemia must also be considered, with appropriate care taken to prevent acute sickle crisis, DVT, and pulmonary embolism. Therefore, coordination with an established sickle cell program is critical to ensure appropriate pre-hydration, transfusion, and anticoagulation protocols are followed to prevent perioperative medical complications. There is no known increased risk in this patient population to using the bone graft material, so the main consideration for contraindications are related to the surgical risk of a sickle cell patient and how well his or her disease is being managed.
AVN is a common problem for patients with sickle cell disease and this report demonstrates a technique of staged decompression of necrotic bone in the bilateral humeral heads with synthetic bone grafting to determine if this could function as a joint preservation strategy. This procedure was considered successful to alleviate the patients’ pain in both of her arms (bilateral humeral heads). The application of this procedure is significant because it could be used in various future medical joint preservation cases for a wide range of patients.
Joint degeneration and long-term pain are common outcomes of sickle cell anemia and other disease processes. While decompression and grafting will not change the underlying disease process, it is our hope to provide improved the quality of life for these patients using this procedure. Our goal is to apply this joint preservation technique to more sickle cell patients and patients with other diseases causing joint pain and degeneration to improve not only the quality of joint function, but also the quality of life.
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|How to Cite This Article: Steffensmeier AM, Kirkham K, Wiemann JM. Core Decompression with Synthetic Grafting as a Joint Preservation Strategy in Humeral Avascular Necrosis Due to Sickle Cell Anemia: A Case Report. Journal of Orthopaedic Case Reports 2016 Nov-Dec;6(5):62.64. Available from: https://www.jocr.co.in/wp/2016/11/10/2250-0685-634-fulltext/|
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