Abstract
Objective
To compare computed tomography (CT) with digital radiography for the detection of osteoarthritis (OA) of the first carpometacarpal (CMC1) and scaphotrapeziotrapezoid (STT) joint.
Materials and methods
We retrospectively identified patients who were assessed for CMC1 OA or STT OA at our hand surgery outpatient clinic between January 2008 and March 2011, and who had both a digital radiograph and a CT scan of the hand within a 3-month period. CT and radiographic images were scored independently by two musculoskeletal radiologists for joint space narrowing (JSN), osteophytes, subchondral sclerosis, bone cysts, and erosions in the CMC1 and STT joints.
Results
Thirty patients were identified. The inter-reader reliability of CT for the detection of CMC1 OA (ICC 1.00) and STT OA (ICC 0.80) was higher than radiography (ICC’s 0.15 and 0.45). In comparison with their own radiographical scoring, both readers detected with CT 3 more patients with CMC1 OA, and 13 and 5 more patients with STT OA.
Conclusion
Computed tomography had a higher inter-reader reliability and detection rate for both CMC1 and STT OA, compared with radiography. As surgical treatment selection of thumb base OA depends on the presence of pathology in the CMC1 and STT joints, CT may improve treatment selection and surgical planning.
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Acknowledgements
We would like to thank Ali Hosseini for his help with the data collection.
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No external funding was acquired for this study
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The authors declare that there are no conflicts of interest.
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All authors contributed to the conception and design; were involved in revising the manuscript; and approved the final version of the article. GM and RO evaluated all images and MS analyzed the results and wrote the initial draft.
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Saltzherr, M.S., van Neck, J.W., Muradin, G.S.R. et al. Computed tomography for the detection of thumb base osteoarthritis: comparison with digital radiography. Skeletal Radiol 42, 715–721 (2013). https://doi.org/10.1007/s00256-013-1586-7
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DOI: https://doi.org/10.1007/s00256-013-1586-7