Multiple Osteosarcoma is Spontaneously Hypertensive Rats

Abstract

For period from 1971 to 1975, 18 cases of osteosarcoma were experienced among 9132 spontaneously hypertensive rats. The onset was at 72 to 145 days of age and death occurred before 423 days of age. The tumors were multiple being distributed in the skull (11 of 14 cases), caudal vertebrae (8 of 14 cases), and fore- and hind-limb. All the tumors were mainly composed of sarcomatous tissue with some osteoid and cartilage. Metastasis was never observed. Serum Al-P levels of tumor bearing animals were 2 times higher than those without tumor. Bronchiectasis and abscess formation of submaxillary lymph nodes were noted in most affected animals.