Generalized Myositis Ossificans (Familial) in Pigs

Abstract
When 2 to 6 months of age, 34 pigs of a total of 115 sired by one boar developed lesions of generalized myositis ossificans that were similar to this pathologic condition in humans. Their sire had developed, at the age of 9 months, clinical signs compatible with this disease. The macroscopic and microscopic characteristics of the lesions in these pigs are described.