The online version of this article (doi:10.1186/s12891-015-0575-5) contains supplementary material, which is available to authorized users.
All authors declare that they have no competing interests.
CB participated in the conception and design of the study, contributed significantly to the acquisition of the data and revised the manuscript extensively. ST performed the statistical analyses, contributed substantially to the interpretation of the data and reviewed the manuscript critically. NG initiated the conception and participated in the design of the study, and reviewed the manuscript critically. CK drafted the first version of the manuscript and reviewed the manuscript critically. DA contributed substantially to the interpretation of the data and revised the manuscript extensively. All authors read and approved the final manuscript.
Extraspinal manifestations of diffuse idiopathic skeletal hyperostosis (DISH) have been described previously. We aimed to assess the prevalence of elbow hyperostotic spurs, to search for sites discriminating for elbow DISH and to analyze the effect of physical activities, handedness and sex.
Out of 284 patients hospitalized for extraskeletal disorders, 85 patients (33 with and 52 without thoracospinal DISH) agreed to bilateral elbow X-rays in two projections. Clinical information was collected by a standardized questionnaire and X-rays were graded blindly.
A total of 400 hyperostotic spurs (210 unilateral, 95 bilateral) were present at 11 predefined sites. The most frequent sites affected were the olecranon (20.8 %), lateral epicondyle (17.8 %) and medial epicondyle (15.5 %). In carriers of thoracospinal DISH significantly more hyperostotic spurs were present at the lateral and medial epicondyle compared to non-DISH carriers (OR 4.01 [95 % CI 1.35–12.34] and 2.88 [1.03–8.24], respectively). The olecranon, lateral and medial epicondyle contributed significantly to the classification of elbow DISH (OR 22.2 [4.1–144.7], 9.6 [1.9–61.2] and 10.1 [2.2–52.1], respectively). The prevalence of elbow hyperostotic spurs was higher in 45 patients with a history of heavy physical activities (24.4 % versus 18.0 %, OR 1.48 [1.17–1.86]), at the right elbow (24.2 % versus 18.6 %, OR 1.39 [1.11–1.75]) and in 62 males (22.8 % versus 17.6 %, OR 1.38 [1.06–1.81]).
Hyperostotic spurs at the olecranon, lateral and medial epicondyle had the highest prevalence and disclosed the most pronounced discrimination for elbow DISH. Mechanical factors such as physical activities and handedness, and sex influenced the formation of these spurs.
Additional file 1: Logistic regression analyses of the presence of elbow hyperostotic spurs at 11 specified sites with stepdown regression for four independent variables (thoracospinal hyperostosis, age, physical activities, sex).*p-value (Wald Chi-Square); **95 % CI; ***missing values: no SAS output, the maximum likelihood estimate may not exist. Significant ORs with p < 0.05 are reported in bold.12891_2015_575_MOESM1_ESM.docx
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- Diffuse idiopathic skeletal hyperostosis (DISH) of the elbow: a controlled radiological study
Sergio R Thomann
Niklaus J Gerber
- BioMed Central
Neu im Fachgebiet Orthopädie und Unfallchirurgie
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