REGRESSION OF HYPERTROPHIC OSTEOPATHY FOLLOWING REMOVAL OF INTRATHORACIC NEOPLASIA DERIVED FROM VAGUS NERVE IN A DOG

Surgical removal of an intrathoracic tumor derived from a vagus nerve was undergone in a dog with hypertrophic osteopathy. The tumor was pat hologically diagnosed as malignant schwanoma. Soft tissue swelling, la meness, and itchiness in four limbs disappeared within 7 days after su rgery. The proliferated periosteal osteophytes of the four limbs was p rogressively reduced with time by follow-up radiography on the 58th da y after surgery. On the 710th day after surgery, these osteophytes wer e greatly decreased as compared to the preoperative radiograms.