“In the depth of winter, I finally realized that within me there lay an invincible summer.”

-Albert Camus

DISEASES OF THE MUSCULOSKELETAL

SYSTEMPART 4

LEGG-CALVE-PERTHES DISEASE

YOUNG, SMALL BREEED DOGS

http://www.youtube.com/watch?v=72g79wwxLVg

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 INTOBONE RESULTS IN THICKENED CARTILAGE THAT IS PRONE TO INJURY

OSTEOCHONDRITIS DISSECANS

CARTILAGE FLAP OF THE SCAPULOHUMERALJOINT 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

PANOSTEITIS1. PELVIS2. LESIONS OF PANOSTEITIS3. FEMUR

INFLAMMATION IN THE MARROW CAVITIES OF LONG BONES THAT LEADSTO PAIN, LAMENESS, AND FEVER

PANOSTEITISINCREASED MEDULLARY OPACITY

PANOSTEITIS

TREATMENT OF PANOSTEITIS INCLUDESNSAIDS AND CAGE REST

THIS DISEASE IS SELF-LIMITING AND HAS A GOOD PROGNOSIS!

LUXATIONS

HX OF TRAUMA, ACUTE LAMENESS, NON WEIGHT BEARING, POSSIBLESWELLING OVER THE HIP

LUXATIONS

CRANIODORSAL LUXATION IS THEMOST COMMON TYPE

LUXATIONS

THE EHMER SLING IS USED AFTER CLOSED REDUCTION OF THE LUXATEDHIP 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 BREEDMALE DOGS OLDER THAN 7 YRS OFAGE

THE DISTAL RADIUS IS THE MOSTCOMMON LOCATION

TUMORS OF THE BONE

85%-90% OF BONE CANCER IN DOGS IS OSTEOSARCOMA

TUMORS OF THE BONE

OSTEOSARCOMA TENDS TO OCCUR AWAY FROMTHE 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 LIMBALONG 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