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. 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