3. UNC MSK Course Day 2 Lab XR UNKNOWNS (for self study)

4. Anatomy, names?

5. Acromion AC joint Gr. Tuberosity Coracoid Glenoid

6. Anatomy?

7. Axillary view AC Joint Glenoid Acromion

8. Pathology?

9. Bilateral Clavicle fx

11. Pathology?

12. Anterior glenohumeral (shoulder) dislocation. How do we know it is anterior?

13. Anterior glenohumeral (shoulder) dislocation. The fact that we see the humeral head in profile tells us it is externally rotated (it would be internally rotated if the patient was dislocated posteriorly.) An internally rotated humeral head looks like a “light bulb”.

14. Anterior glenohumeral (shoulder) dislocation. The fact that we see the humeral head in profile tells us it is externally rotated (it would be internally rotated if the patient was dislocated posteriorly.) An internally rotated humeral head looks like a “light bulb”.

15. Anterior glenohumeral (shoulder) dislocation. We can also obtain an “axillary view” and see that the humeral head is anterior to the glenoid.

16. Anatomy?

17. Trapezius Acromion Supraspinatus Supspinatus tendon Glenoid Subscapularis Deltoid

18. Pathology?

19. Rotator Cuff tear (tendon should be black)

20. Anatomy?

21. Olecranon/coronoid fossa Medial epicondyle Capitellum Trochlea Radial Head Radial Tuberosity

22. Anatomy?

23. Olecranon/coronoid fossae Radial head Coronoid process Olecranon

24. Pathology?

25. Supracondylar fracture of the humerus in a child

26. Pathology?

27. Posterior dislocation of elbow

28. Pathology?

29. Proximal ulna fracture With fracture subluxation of radial head This combination of injuries is known as a “Monteggia fracture.”

30. Pathology?

31. Elbow fracture dislocation Fracture of the olecranon with anterior dislocation of radius and ulna. Air in soft tissues indicates that it is an “open” fracture.

32. Pathology?

33. Fracture of the radius and ulna

34. Pathology?

35. Distal radial “buckle” or “torus” fracture. The bone has “crumpled” rather than broken.

36. Distal radial “buckle” or “torus” fracture. The bone has “crumpled” rather than broken.

37. Anatomy?

38. Metacarpal head Hamate Pisiform Triquetrium Ulnar Syloid Lunate Sesamoid bones Capitate Scaphoid Radial Syloid

39. Anatomy?

41. Lunate

42. Anatomy?

43. Scaphoid

44. Anatomy?

45. Capitate

46. Anatomy?

47. Pisiform

49. Pathology?

50. Scaphoid Fracture

51. Pathology?

52. Scapholunate dissociation The scapholunate ligaments are torn allowing separation of the two bones like a gap between the front teeth (“Terry Thomas” or “Letterman’s sign”). The spacing between all of the carpal bones should be the same.

53. Pathology?

54. Hairline fracture 3 rd metacarpal shaft

55. Pathology?

56. Unstable elbow dislocating upon extension. Note: fracture fragment from coronoid process

57. Foggy Alaskan valley near Hubbard glacier