The iliac wing sign: an indicator of the presence of bone and/or soft-tissue injury of the pelvis and hips
| Autor: | Taro Shimono, Taizo Hiraoka, Makoto Hosono, Takahide Kakigi, Kazumasa Nishimura |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male medicine.medical_specialty Soft Tissue Injuries Adolescent Sensitivity and Specificity Fractures Bone Young Adult Fiducial Markers medicine Humans Radiology Nuclear Medicine and imaging Hip pain Child Pelvis Aged Aged 80 and over medicine.diagnostic_test business.industry Reproducibility of Results Magnetic resonance imaging General Medicine Middle Aged medicine.disease Predictive value Arthralgia Magnetic Resonance Imaging Exact test medicine.anatomical_structure Iliac wing Iliacus muscle Soft tissue injury Female Radiology business Hip Injuries |
| Zdroj: | European journal of radiology. 81(9) |
| ISSN: | 1872-7727 |
| Popis: | To prospectively evaluate the feasibility of using the "iliac wing sign (IWS)" as an indicator of bone and/or soft-tissue injury of the pelvis and hips on magnetic resonance (MR) imaging. IWS means edema of the iliacus muscle attachment entering the iliac wing that is visualized as a linear high signal intensity on fat-suppressed T2-weighted MR images.Consecutive 106 patients who complained of hip pain were enrolled in this study. We evaluated the correlation between IWS and bone and/or soft-tissue injury of the pelvis and hips using Fisher's exact test. Further, performance parameters of sensitivity, specificity, accuracy, the positive predictive value (PPV), and negative predictive value (NPV) of IWS were calculated.Thirty-eight of the 106 (36%) patients had bone and/or soft-tissue injury. Twenty-seven of these 38 (71%) patients with injury showed a positive IWS, while only 11 of 68 (16%) patients without injury showed a positive IWS (p.0001). IWS, thus, yielded a sensitivity of 71%, specificity of 84%, accuracy of 79%, positive predictive value (PPV) of 71%, and negative predictive value (NPV) of 84%.In cases with a positive IWS, the careful interpretation of MR images is needed because injury presence is highly likely, as suggested by the relatively high sensitivity and PPV. IWS absence may mean a low probability of injury because of the high specificity and NPV. |
| Databáze: | OpenAIRE |
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