Accuracy of high-resolution sonography compared with magnetic resonance imaging in the diagnosis of head and neck venous vascular malformations |
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Authors: | Ahuja A T Richards P Wong K T Yuen E H Y King A D |
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Affiliation: | Department of Diagnostic Radiology & Organ Imaging, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR. aniltahuja@cuhk.edu.hk |
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Abstract: | AIMS: To evaluate whether modern ultrasound examination helps to establish the diagnosis of head and neck venous vascular malformations (VVMs) and whether it can delineate their full extent. MATERIALS AND METHODS: Sonographic appearances of 30 head and neck VVMs were assessed for: location, extent, internal architecture, presence of flow and phleboliths. These results were compared with the magnetic resonance imaging (MRI) of the same patients. RESULTS: The lesions showed well-defined margins (22 of 30, 73%), heterogeneous (30 of 30, 100%) and hypoechoic echo pattern (27 of 30, 90%), with sinusoidal spaces (28 of 30, 93%) and phleboliths (24 of 30, 80%) on grey-scale imaging, and flow signal on Doppler (28 of 30, 93%). For delineating the extent, ultrasound was comparable with MRI in 53% (16 of 30) and inferior to MRI in 47% (14 of 30). Ultrasound did not detect deeper extent, intra-osseous involvement and other clinically occult VVMs. CONCLUSION: Ultrasound with high-resolution transducers can confidently suggest the diagnosis of head and neck VVMs in up to 90% of cases, and delineate the full extent of some superficial lesions. The major disadvantage is its inability to evaluate intra-osseous involvement and the entire extent of large, deep-seated lesions. |
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Keywords: | head and neck haemangioma venous vascular malformation sonography |
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