In the early stages of<unk> , biopsy shows inflammation of the periosteum and adjacent soft tissues. After this resolves, the periosteum remains thickened, and subperiosteal immature lamellar bone can be seen on biopsy, while the bone marrow spaces contain vascular fibrous tissue. Eventually, the inflammation and subperiosteal changes resolve, and hyperplasia of lamellar<unk>  bone can be seen. Radiographs initially show layers of periosteal new bone formation with<unk>  thickening. Periosteal new bone may cover the diaphysis of the bone, causing an increase in diameter of the bone. Over time, the periosteal new bone density increases, becoming homogeneous with the underlying cortex. Eventually, the bone remodels and resumes a normal appearance.
Infantile cortical hyperostosis
Acrofrontofacionasal dysostosis
Melorheostosis
Acrodysostosis
Pycnodysostosis
Buccal exostosis
Spondylocostal dysostosis
Thanatophoric dysplasia