Background: Soft tissue foreign bodies are a common cause of orthopedic consultation in emergency\r\ndepartments. It is difficult to confirm their existence because conventional radiology only detects radio-opaque\r\nforeign bodies. Sonography can be a useful diagnostic method. The aim of this study is to evaluate diagnostic\r\naccuracy of sonography in detection and localization of non-opaque foreign bodies.\r\nMethods: We evaluated 47 patients with suspected foreign body retention in soft tissues by 10 MHz linear array\r\ntransducer. A single radiologist performed all examinations with 6 years� experience in musculoskeletal Sonography.\r\nWe detected and localized the presence of the foreign body in the soft tissue as guidance for facilitating the\r\nsurgery.\r\nResults: We detected soft tissue foreign body in 45 cases as hyperechoic foci. Posterior acoustic shadowing was\r\nseen in 36 cases and halo sign was seen in 5 cases due to abscess or granulation tissue formation. Surgery was\r\nperformed in 39 patients and 44 foreign bodies were removed.\r\nConclusion: Sonography is a useful modality in detection and localization of radiolucent foreign bodies in soft\r\ntissue which can avoid misdiagnosis during primary emergency evaluation.
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