This is a '''rare condition''' that occurs in '''all species'''.
This is a '''rare condition''' that occurs in '''all species'''.
−
It is a '''diffuse, periosteal proliferative condition''' of long bones secondary to '''neoplastic or infectious masses''' in the thoracic or abdominal cavity, including [[Respiratory Bacterial Infections - Pathology#Tuberculosis|tuberculosis]], [[Pulmonary Neoplasia|pulmonary neoplasia]], [[Pleuritis|granulomatous pleuritis]] and granulomatous lymphadenitis of the mediastinal lymph nodes.
+
It is a '''diffuse, periosteal proliferative condition''' of long bones secondary to '''neoplastic or infectious masses''' in the thoracic or abdominal cavity, including [[Tuberculosis|tuberculosis]], [[Pulmonary Neoplasia|pulmonary neoplasia]], [[Pleuritis|granulomatous pleuritis]] and granulomatous lymphadenitis of the mediastinal lymph nodes.
The exact pathogenic mechanism is unknown, but several theories have been proposed:
The exact pathogenic mechanism is unknown, but several theories have been proposed: