Kara Gaetke Udager MD, Presenter: Nothing to Disclose

Corrie Marlene Yablon MD, Abstract Co-Author: Nothing to Disclose

Deepa R. Pai MD, Abstract Co-Author: Nothing to Disclose

Qian Dong MD, Abstract Co-Author: Nothing to Disclose

Gandikota Girish MBBS, FRCR, Abstract Co-Author: Nothing to Disclose

Jon A. Jacobson MD, Abstract Co-Author: Consultant, BioClinica, Inc Royalties, Reed Elsevier Equipment support, Terumo Corporation Equipment support, Arthrex, Inc

After review of this exhibit, the viewer will be able to: 1. List common causes of pathology of the extensor mechanism 2. Explain the normal anatomy of the extensor mechanism including common anatomical variants 3. Describe the ultrasound and MRI appearance of pathology of the extensor mechanism 4. Discuss the factors determining the utility of ultrasound vs. MRI in evaluating the extensor mechanism  

We aim to describe and illustrate the spectrum of imaging findings in the extensor mechanism on both ultrasound and MRI, including:   - Quadriceps and patellar tendon tears, complete and partial - Quadriceps tendinosis - Patellar tendinosis, including jumper’s knee and related entities of Osgood-Schlatter and Sinding-Larsen-Johansson syndromes - Patellar instability including sequela of acute and chronic dislocation - Patellar fracture - Patellofemoral osteoarthrosis - Patellar tracking abnormalities with fat pad abnormality - Bursal pathology - Normal variants and imaging pitfalls including dorsal defect of the patella, bipartite patella, and magic angle artifact  

http://abstract.rsna.org/uploads/2014/14005451/14005451_v72d.pdf

Udager, K, Yablon, C, Pai, D, Dong, Q, Girish, G, Jacobson, J, Ultrasound and MRI Evaluation of the Extensor Mechanism.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14005451.html