Pathology Lab # 2 (Bone and Joint) Flashcards
What can be seen in this image ?
Suppurative Osteomyelitis (Cause: Rhodoccoccus equi)
What are potential differential for cattle bone?
Hx: Chronic lameness for a while, one leg shorter than the other.
- Micromelia, Improperly healed fracture, Chondrodysplasia.
What is seen in this image? What is a potential Cause?
- Proliferative lesion
- Causes: Bone remodeling, fistulus tracts.
What is the morphological diagnosis for this cats jaw? What can be seen in the histological image?
- Bacterial colonies found in bone biopsy sample, H&E stain.
What is seen in this image? What is the histopathologic diagnosis?
What is seen in these histologic slides? What indicates this is malignant? (Hint: Green Arrows)
Chondrosarcoma, humerus, 8-year-old female Mastiff - Oscar Illanes Arrows: neoplastic chondrocytes undergoing mitosis
What can be seen in this image? Patient was a 9 year old great dane and had a progressive history of slow progressive lameness and reluctance to stand and walk. What is the joint seen in the 2nd image? What can be seen in the 2nd image?
Chronic osteoarthritis – left coxo-femoral joint. Fibrillation, eburnation, villous hypertrophy of synovial membrane and osteophyte formation is seen.
This image is of the stifle joint of the same great dane patient. What can be seen in this image?
Chronic osteoarthritis, left stifle joint. Note severely damaged articular cartilage and prominent osteophyte formation at the chondro- osseous junction.
This image is of the spine of the same great dane patient. What can be seen here?
Spondylosis deformans (ankylosing spondylosis)
What can be seen in this image? This patient was a 6 month old steer with a history of chronic progressive lameness and ataxia.
Chronic suppurative vertebral osteomyelitis leading to suppurative meningomyelitis and focal compression of the overlying spinal cord. Note pale discoloration of the vertebral body and focal area of osteolysis (bone destruction leads to the formation of a cavity).
This image is of the same 6 month old steer. What can be seen in this area of the distal femur and proximal tibia?
Moderate to severe erosive and ulcerative lesions were present in the articular cartilage of the distal femur and proximal tibia in both stifle joints. B113-09, UCVM
What can be seen in this close up of the steers femoral condyle?
Lesion Consistent with an OCD lesion.
Joint Mice present with severe ulceration.
What is this area in this young steers stifle joint being lifted by the tweezers?
Detached flap of cartilage found within the joint cavity: “Joint mice”, stifle joint (OCD).
What can be seen in this image of the steers femoral condyles?
Fibrillation and ulceration of articular cartilage – femoral condyles
What abnormality can see in this horse above?
Lordosis
This image is of the 31 year old geldings dentition. What is the issue here? Could this have contributed to the geldings weight-loss?
Incisors completely worn down, as well as some missing teeth. This definitely could have contributed to its weight-loss.
This image is the same 31 year old gelding. What can you see in its spine? If it haf such severe lordosis, why is it not seen here?
Lumbar segment of vertebral column, Intervertebral disk disease (IDD) leading to sub-luxation of L3-L4 and spondylosis deformans.
Not as severe looking since the heavy abdominal viscera is no longer pulling down on the spine showing the severe lordosis.
What is seen in this image of this geldings acetabulum?
Acetabulum of this old horse. Note erosion & ulceration of the articular cartilage.
What can be seen in this horses elbow joint?
Elbow joint. Fibrillation (erosion) and eburnation (ulceration) Of the articular cartilage. Note “wear lines” in the Humeral condyles.
What is evident in this close up of the horses elbow joint?
How can you tell if cartilage changes are primary or secondary?
Depends when they developed. Usually secondary to age if occurs later in life.
