Radiology Package 22

1. Radiology Package 22 Elbow

2. 2-year old Chow Chow“Meiling” • Hx: Lameness localized to the right elbow.

3. 2-year old Chow Chow“Meiling” • RF • There is proliferative bone on the dorsal aspect of the anconeal process of the ulna. • Osteophyte formation is present on the cranial surface of the radial head and at the cranial articular margin of the humeral condyles. • The trochlear notch is mildy sclerotic and its articular surface is indistinct. • The medial coronoid process is visible through the radial head in the lateral view. • In the craniocaudal view there is osteophyte formation on the margin of the medial coronoid process. • The surface of the medial epicondyle of the of the humerus is rougher than normal indicating the presence of proliferative new bone. • RD • Degenerative joint disease • Fragmented medial coronoid process

4. 8-year old German Shepherd “Warlock” • Hx: Presented with a non-weight bearing lameness of the right forelimb of 1 weeks duration. The right elbow is swollen and painful.

6. 8-year old German Shepherd “Warlock” • RF • Ununited anconeal process is present. • Osteophytes are present on the distal humeral epicondyles, humeral condyles, proximal ulna and proximal radius. • Sclerosis of the trochlear notch is present. • RD • Secondary degenerative joint disease • Ununited anconeal process process

7. 8-month old MC Chow • Hx: Episodes of forelimb stiffness of 2 months duration. The dog showed signs of discomfort when the left elbow was manipulated. L

8. L R

9. 8-month old MC Chow • RF • There is sclerosis of the trochlear notches and an indistinct appearance of the medial coronoid processes noted in both elbows. • In the Craniocaudal view the medial coronoid processes appear to be remodeled. • A small lucent area is seen in each medial humeral condyle. • Osteophytes are seen associated with the dorsal proximal radius bilaterally and the anconeal process on the left. • RD • Bilateral medial humeral condylar OCD • Bilateral fragmented medial coronoid process is strongly suspected • Degenerative joint disease

10. 7-month old German Shepherd“Tiger” • Hx: Lameness localized to the right forelimb. He has been lame since the age of 4 months.

12. 7-month old German Shepherd“Tiger” • RF • There is extensive arthritic change in the elbow. • An ununited anconeal process is present. • Marked humeroulnar subluxation is evident. • A faint flattening of lucency of the medial humeral condyle is noted and is considered evidence of osteochondrosis. • The medial coronoid process has an indistinct appearance in the lateral view and osteophyte formation is present on its margins in the CC view. • Diffuse medullary sclerosis is visible in the distal humerus and in the proximal ulna distal to the trochlear notch. • RD • Secondary degenerative joint disease • Ununited anconeal process • Humeroulnar subluxation • Fragmented medial coronoid process • Medial humeral condylar OCD • Panosteitis – humerus and ulna

13. 9-month old Labrador Retriever “Sam” • Hx: Lameness localized to the left elbow.

14. 9-month old Labrador Retriever “Sam” • RF • There is a minor amount of proliferative bone on the dorsal aspect of the anconeal process of the ulna. • Osteophyte formation is present on the cranial surface of the radial head. • The trochlear notch is mildly sclerotic. • The medial coronoid process is visible through the radial head in the lateral view – it is indistinct in appearance and does not extend as far cranially as normal. • In the CC view there is mild osteophyte formation on the margin of the medial coronoid process. • RD • Degenerative joint disease • Fragmented medial coronoid process

15. 9-month old Rottweiler“Tyler” • Hx: Lameness localized to the right forelimb. He has been lame since 3 months of age.

16. 9-month old Rottweiler“Tyler” • RF • The dorsal margin of the anconeal process of the ulna is slightly irregular but there is no evidence of a significant amount of proliferative bone in the region. • Osteophyte formation is present at the cranial articular margin of the humeral condyles. • The trochlear notch of the ulna is sclerotic. • There is minimal incongruency of the joint. • Osteophytes are present on the medial aspect of the joint in the area of the medial coronoid process. • The medial epicondyle of the humerus is roughened and irregular. • RD • Fragmented medial coronoid process • Secondary degenerative joint disease • Humeroradial subluxation

17. 12-month old German Shepherd“Cisco”

18. 12-month old German Shepherd“Cisco” • RF • There is a focal subchondral bony lucency of the humeral trochlea bilaterally. • The right medial epicondyle is rough relative to the left. • RD • OCD of the distal humeral condyles.

19. 2-year old Rottweiler“Tango” • Hx: Lameness localized to the right elbow.

21. 2-year old Rottweiler“Tango” • RF for right elbow • There is proliferative bone on the dorsal aspect of the anconeal process of the ulna. • The trochlear notch is mildly sclerotic. • The medial coronoid process is visible through the radial head in the lateral view – it is indistinct in appearance and appears to end abruptly. • In the CC view there is subtle rounding of the medial coronoid process. • RF for left elbow • A faint periosteal response is visible on the dorsal aspect of the anconeal process of the ulna. • RD • Secondary degenerative joint disease present on the right elbow • Fragmented right medial coronoid process • Minimal degenerative joint disease of present

22. Mature Rottweiler “Rebel” • Hx: Lameness of the right forelimb. He is painful on flexion of the elbow joint.

23. Mature Rottweiler “Rebel” • RF • There is a large amount of proliferative bone on the dorsal aspect of the anconeal process of the ulna. • Osteophyte formation is present on the cranial surface of the radial head and at the articular margin at the cranial aspect of the humeral condyles. • The trochlear notch is sclerotic. • The medial coronoid process is visible through the radial head in the lateral view but is irregular and indistinct in appearance. • In the CC view there is a large osteophyte on the margin of the medial coronoid process. • The soft tissues surrounding the joint are thickened – the margins of the joint capsule are faintly visible in the lateral view. • RD • Degenerative joint disease • Fragmented medial coronoid process

24. 5-month old Rottweiler“Tasha” • RF • The left anconeal process is markedly remodeled and there is a vertical irregular lucency in it. • The subchondral bone of the ulna is sclerotic. • The right anconeal process is normal. • RD • Left ununited anconeal process