ABSTRACT
From 1981 to 1997, 26 cases of myositis ossificans circumscripta (MOC) were diagnosed and treated in our hospital, 22 of whom, occupying 84.6%, were confirmed by pathological examination. All the clinic data are reported as follows.
ABSTRACT
The structure and the blood supply of perichondral ring of human being and rabbits in developing period were studied by microangiographic and histological methods. Perichondral ring is situated around the epiphyseal disc and metaphysis and consists of osseous ring, zone of mesenchymal cell, which contains fairly abundant blood vessels derived from the metaphyseal periosteum and perichondrium. The perichondrium is thick and also contains abundant vessels which connect epiphyseal and metaphyseal circulations in the extra-osseous and part of which passes through the zone of mesenchymal cell to supply the epiphyseal disc. Role of perichondral ring in the development period of bones were discussed.
ABSTRACT
The distal femoral epiphyses of 18 human foetus and 10 children were studied by microangiographic and histological methods. The results showed that only the articular cartilage is avascular. Characteristic of vascularity in the chondroepiphyses is that the blood vessels coming from inter-condylar fossa are distributed in the center of chondroepiphyses, those coming from medial and lateral aspects of the condyles are distributed in the outer part of the condyles and those closing to epiphyseal plate mainly come from the area superior to the patellar surface and the area superior to the inter-condylar fossa. The secondary center of ossification first takes place around cartilage canal. The increase of the ossification center is faster in the areas adjacent to blood vessels than the areas far from blood vessels. The blood vessels within cartilage canals in the chondroepiphyses transform to epiphyseal vessels which remained as the blood supply to the ossification center during ossification process. Before 2 years of age, the blood vessels supplying the ossification center are 3-5 vessels coming from inter-condylar fossa. After 2 years of age, the blood vessels coming from the area superior to the patellar surface begin to supply the ossification center. After 5 years of age, the blood vessels coming from lateral aspects of the condyles also take part in the supply of the ossification center.