“In the depth of winter, I finally realized
that within me there lay an invincible
summer.”
-Albert Camus
DISEASES OF THE
MUSCULOSKELETAL
SYSTEM
PART 4
LEGG-CALVE-PERTHES DISEASE
YOUNG, SMALL BREEED DOGS
http://www.youtube.com/watch?v=72g79w
wxLVg
LEGG-CALVE-PERTHES DISEASE
May also be considered a
Developmental disorder
LEGG-CALVE-PERTHES DISEASE:
TREATMENT
FEMORAL HEAD AND NECK EXCISION
FHNE
DEGENERATIVE DISORDERS: OSTEOCHONDRITIS
DISSECANS
OSTEOCHONDRITIS DISSECANS
FAILURE OF THE LOWER LAYERS OF ARTICULAR CARTILAGE TO MATURE INTO
BONE RESULTS IN THICKENED CARTILAGE THAT IS PRONE TO INJURY
OSTEOCHONDRITIS DISSECANS
CARTILAGE FLAP OF THE SCAPULOHUMERAL
JOINT WHICH IS THE MOST COMMON LOCATION
OSTEOCHONDRITIS DISSECANS
OSTEOCHONDRITIS DISSECANS
CARTILAGE FLAP IN THE STIFLE JOINT
OSTEOCHONDRITIS DISSECANS
http://www.youtube.com/watch?v=_bJqjqh5a2A
INFLAMMATORY CONDITIONS: PANOSTEITIS
LARGE, MEDIUM BREEDS AT A YOUNG AGE 6-18 MONTHS
CAUSE: UNKNOWN, BUT THERE ARE MANY SUSPECTED CONTRIBUTORS
PANOSTEITIS
1. PELVIS
2. LESIONS OF PANOSTEITIS
3. FEMUR
INFLAMMATION IN THE MARROW
CAVITIES OF LONG BONES THAT LEADS
TO PAIN, LAMENESS, AND FEVER
PANOSTEITIS
INCREASED MEDULLARY OPACITY
PANOSTEITIS
TREATMENT OF PANOSTEITIS INCLUDES
NSAIDS AND CAGE REST
THIS DISEASE IS SELF-LIMITING AND HAS A GOOD PROGNOSIS!
LUXATIONS
HX OF TRAUMA, ACUTE LAMENESS, NON WEIGHT BEARING, POSSIBLE
SWELLING OVER THE HIP
LUXATIONS
CRANIODORSAL LUXATION IS THE
MOST COMMON TYPE
LUXATIONS
THE EHMER SLING IS USED AFTER CLOSED REDUCTION OF THE LUXATED
HIP JOINT; THE DOG SHOULD BE CONFINED FOR 7-10 DAYS

I live each day as if it were my last;
which is why I don’t have any clean
laundry because who wants to be
doing laundry on their last day of
life!!”
LUXATIONS
TUMORS OF THE BONE
MOST COMMON IN LARGE BREED
MALE DOGS OLDER THAN 7 YRS OF
AGE
THE DISTAL RADIUS IS THE MOST
COMMON LOCATION
TUMORS OF THE BONE
85%-90% OF BONE CANCER IN DOGS IS OSTEOSARCOMA
TUMORS OF THE BONE
OSTEOSARCOMA TENDS TO OCCUR AWAY FROM
THE ELBOW AND TOWARDS THE KNEE
TUMORS OF THE BONE
TUMORS OF THE BONE
METASTASIS OF OSTEOSARCOMA TO THE LUNGS; THERE IS USUALLY ALREADY
SOME MICROSCOPIC SREAD OF TUMOR BY THE TIME IT IS DIAGNOSED
TUMORS OF THE BONE
AMPUTATION OF THE AFFECTED LIMB
ALONG WITH CHEMOTHERAPY IS A
COMMON TREATMENT PLAN
SURVIVAL TIME IS ~12 MONTHS EVEN WITH AGGRESSIVE THERAPY
MYOPATHIES: POLYMYOSITIS
MYOPATHIES: POLYMYOSITIS
MYOPATHIES: MASTICATORY MUSCLE
MYOSITIS (aka atrophic myositis, eosinophilic
myositis)
CLINICAL SIGNS INCLUDE ELEVATED 3RD EYELIDS, ATROPHY OF THE JAW
MUSCLES, AND INABILITY TO OPEN THE MOUTH (TRISMUS)
MYOPATHIES: FELINE
POLYMYOPATHY
CERVICAL VENTROFLEXION OF THE NECK 2° TO HYPOKALEMIA