The role of MR imaging in scaphoid disorders |
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Authors: | Apostolos Karantanas Zoe Dailiana Konstantinos Malizos |
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Institution: | (1) Department of Radiology, Medical School, University of Crete, Heraklion, Greece;(2) Department of Orthopedic Surgery, School of Health Sciences, University of Thessaly, Larissa, Greece;(3) Department of Radiology, University Hospital, Stavrakia, Heraklion, 711 10, Greece |
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Abstract: | The scaphoid bone of the wrist is one of the most commonly fractured bones in the body. Due to its importance in the biomechanics
and functionality of the wrist, it is important to depict and characterize the type of injury. Plain radiographs and scintigraphy
may fail to disclose the type and severity of the injury. In patients with normal initial plain radiographs, MR imaging can
discriminate occult fractures from bone bruises and may also demonstrate ligamentous disruption. MR imaging can also discriminate
the proximal pole viability versus avascular necrosis secondary to previous fracture, which is important for treatment planning.
Treatment of non-united fractures with vascularized grafts can be evaluated with contrast-enhanced MR imaging. Idiopathic
osteonecrosis or Preiser’s disease was originally described after trauma. The non-traumatic disorders of the scaphoid include
post-traumatic osteoarthritis, inflammatory bone marrow edema in patients with rheumatoid arthritis, and osteomyelitis. MR
imaging is helpful in all the above disorders to demonstrate early bone marrow edema, cartilage degeneration and associated
subchondral marrow changes. The most commonly found tumors in the scaphoid are usually benign and include enchondroma, osteoblastoma
and osteoid osteoma. MR imaging is not mandatory for the initial diagnosis, which should be based on plain X-ray findings. |
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Keywords: | Scaphoid disorders X-ray/diagnosis MR imaging/diagnosis Fractures Fractures/complications Osteonecrosis Vascularized grafts/surgery |
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