Award Winning Anterior Knee Pain Educational Exhibit at The American Roentgen Ray Society (ARRS)Annual Meeting

1. Anterior Knee Pain: A Diagnostic Conundrum Brian Sabb, DO J. David Blaha, MD Department of Orthopaedic Surgery

6. Prepatellar Bursitis PD PD FAT SAT

7. Prepatellar Bursitis PD PD FAT SAT T2 FAT SAT

9. Quadriceps Fat Pad Edema PD PD FAT SAT T2 FAT SAT

12. Hoffa’s Disease PD PD FAT SAT

14. Localized Nodular Synovitis PD PD FAT SAT T2 FAT SAT

16. Pigmented Villonodular Synovitis (PVNS) PD PD FAT SAT T2 FAT SAT

18. Intraarticular Chondroma PD PD FAT SAT T2 FAT SAT

20. Infrapatellar Plica Injury PD PD FAT SAT T2 FAT SAT

23. Patellar Tendinosis PD PD FAT SAT T2 FAT SAT

25. Complete Patellar Tendon Tear PD FAT SAT Longitudinal Ultrasound

27. Quadriceps Tendon Tear Full thickness tear by MR with diastasis of fibers filled by high T2 fluid and and by longitudinal US with hypoechoic fluid PD FAT SAT

28. PD FAT SAT Complete Quadriceps Tendon Tear PD Note: patella baja

30. Gout of The Patellar Tendon PD PD FAT SAT T2 FAT SAT T2 FAT SAT T2 FAT SAT

31. Gout of The Patellar Tendon by US Intratendinous Crystals Peripheral hyperemia Shadowing

33. Psoriasis PD PD FAT SAT PD FAT SAT

34. Ankylosing Spondylitis

35. Ankylosing Spondylitis PD PD FAT SAT T2 FAT SAT T1 Extensive bone marrow edema and associated enthesitis

36. Reactive Arthritis

38. Sequela of Osgood Schlatter PD PD FAT SAT T2 FAT SAT T1 Note the irregularity and edema causing recurrent and chronic pain

41. Transient Patellar Dislocation Lateral femoral condyle T2 FAT SAT Medial patella

43. January 2001 at 27 years old August 2005 at 31 years old Excessive Lateral Pressure Syndrome T2 FAT SAT T2 FAT SAT The OA renders treatment/surgery less effective Suggest the diagnosis based on the tilt; prior to OA Images courtesy of Mark Schweitzer, MD

45. Patellar Tendon Lateral Femoral Condyle Friction Syndrome PD FAT SAT Cor FAT SAT T2 FAT SAT The alta allows for the contact between the tendon and the femoral condyle

48. Bipartite Patella PD FAT SAT T2 FAT SAT Cor T2 FAT SAT Note the accessory ossicle is typically superolateral Bone marrow edema and cystic changes correlate with pain Cor T1

49. Multipartite Patella T2 FAT SAT Cor T2 FAT SAT Cor T2 FAT SAT T1 Note the typical superolateral fragments

51. Patellar Fracture

52. Patellar Fracture Axial CT showing a lipohemarthrosis

53. Corresponding Author: Brian Sabb [email_address]