The unsolved problem of musculoskeletal hydatid disease: two case reports

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BACKGROUND: Hydatidosis is a parasitic infection caused by Echinococcus granulosus and humans are usually an accidental intermediate host. Involvement of the musculoskeletal system is reported to occur in 0.5% to 4% of the cases. CASE PRESENTATION: We present our experience with two cases of musculoskeletal hydatidosis in black African patients that required orthopaedic surgical intervention. A 51-year-old black African female presented with right hip hydatid disease and a 37-year-old black African female presented with the disease affecting the left shoulder. Both patients presented with joint pain and reduced range of motion. The patient with involvement of the shoulder had a background history of human immunodeficiency virus, this was not present with the other patient. Diagnostic work-up confirmed peri-articular hydatid disease and both patients were surgically managed with arthroplasty. Post-operative complications encountered include hardware loosening from bone lysis and hardware failure. DISCUSSION: The medical literature describes a limited number of cases of peri-articular musculoskeletal hydatid disease. Patients are often subjected to many investigations, prolonged treatment periods and multiple surgeries. Concurrent use of medical and surgical treatment is advocated however, the choice of surgery is individualised. CONCLUSION: Hydatid disease must always feature in the differential diagnosis of multiple lytic bone lesions and radical surgical intervention may be required from the outset.

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