Brandon Murti, Presenter: Nothing to Disclose

George Robert Matcuk MD, Abstract Co-Author: Nothing to Disclose

Eric Allan White MD, Abstract Co-Author: Nothing to Disclose

Dakshesh Bhulabhai Patel MD, Abstract Co-Author: Nothing to Disclose

Aaron Schein MD, Abstract Co-Author: Nothing to Disclose

Deborah M. Forrester MD, Abstract Co-Author: Nothing to Disclose

Linda Anne Vachon MD, Abstract Co-Author: Nothing to Disclose

Christopher Joseph Gottsegen MD, Abstract Co-Author: Nothing to Disclose

Sulabha Masih MD, Abstract Co-Author: Nothing to Disclose

Identify common and uncommon reasons why normally present structures may be absent on musculoskeletal imaging studies Review the differential diagnoses of these various absent findings

Categories Bones : Congenital (e.g. thrombocytopenia-absent radius syndrome, proximal focal femoral deficiency) vs. Acquired (e.g. Gorham disease, trapezectomy) Joint spaces (e.g. coalition, ankylosis) Radiologic signs (e.g. absent bow tie and ghost meniscus signs, winking owl sign) Miscellaneous (e.g. Poland syndrome) Abnormal locations (e.g. tendon tears or dislocations, ulnar nerve transposition) Conclusion Absent musculoskeletal findings may be difficult to identify, but awareness can make the radiologist more cognizant and more likely to include commonly missed absent findings in their search patterns Knowledge of these absent findings and their differential diagnoses is important and helpful to clinicians and patients Although some of these findings may be obvious, the differential diagnostic considerations of their etiology may not be Sometimes it is hardest to see the things that aren’t there

http://abstract.rsna.org/uploads/2014/14002324/14002324_ffn5.pdf

Murti, B, Matcuk, G, White, E, Patel, D, Schein, A, Forrester, D, Vachon, L, Gottsegen, C, Masih, S, Absent Findings at Musculoskeletal Imaging: It Can Be Hardest to See What’s Not There!.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14002324.html