CT case

7-month-old male Labrador Retriever

A 7-month-old male entire Labrador Retriever presented with a 2-week history of severe left hindlimb lameness that had failed to respond to NSAIDs and rest. There was no palpable stifle effusion nor evidence of cranial draw, tibial thrust or patellar luxation on examination. Radiographs were unremarkable.

 

Pre-contrast CT, axial plane at the level of the stifles. There is a poorly delineated region of osteolysis along the caudomedial aspect of the left distal femoral metaphysis with mild irregular periosteal reaction.

Pre-contrast CT, coronal view at the level of the stifles, again demonstrating regional osteolysis measuring 3.5mm in diameter.

 

CT was incredibly useful in this case, particularly given the normal radiographic findings, as a small area of osteolysis was detected affecting the left distal femur which quickly redirected our line of investigation. Ultrasound-guided aspirates of this lesion and a joint tap confirmed osteomyelitis and the patient recovered well following antibiotic therapy.

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