Today’s case is a 7-month-old male intact Lab that presents for intermittent thoracic limb lameness. What is your diagnosis?
Teaching and learning about veterinary diagnostic imaging.
Today’s case is a 7-month-old male intact Lab that presents for intermittent thoracic limb lameness. What is your diagnosis?
LATERAL SHOULDERS SURVEY
Both lateral and skyline projections are available for review. There is a small, well defined lucent area with a surrounding rim of sclerosis seen within the epiphysis of the greater tubercle of right and left humeri. There is no other radiographic evidence of musculoskeletal abnormalities.
Bilaterally symmetrical bone defect of the proximal humeral epiphyses. Bony resorption at the site of insertion of the infraspinatus ligament should be considered.
An MRI was performed, and confirmed bilateral infraspinatus tendonitis with a cyst-like lesion within the greater tubercle at its insertion, likely due to osteonecrosis. The dog was treated conservatively and was not lame 8 months later. The radiographic changes persisted with slight improvement.
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