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  • Presented with episodes of neck pain.
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On the first left rib there is an expansile, ovoid lucent region with cortical lysis

  • Aggressive bone lesion on the left first rib
  • DDX: Metastatic carcinoma, round cell neoplasia, primary osseous neoplasia
  • Rectal examination to rule out urogenital neoplasia (AGASACA, analsaculiths)
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MRI:

  • Normal cervical vertebrae and spinal cord

FNA

  • Non-diagnostic

CT:

  • No other osseous abnormalities were noted

The owner did not want to pursue therapy so the dog was discharged. The cause of this osseous abnormality remains unknown.