[Osteogenesis imperfecta. Human, dog, cat, fox. Comparative analysis of the ultrastructural aspects].

: In the present work the authors have observed the ultrastructure of different types of cartilage and connective tissues of four different species of animals affected with osteogenesis imperfecta (man dog cat and young fox. The ultrastructural pictures demonstrate that the morphological aspects of cartilage of different species are often comparable and all cartilage tissues present the following characters: 1) Some lipid droplets inside the cytoplasm. 2) A reduction of the number and diameter of collagen fibrils. 3) A sensible increase of diameter of the alcianophilic bands that are ultrastructural representation of glycosaminoglycans. Some abnormal aspect has been seen on the connective non cartilagineus tissues.