Osteoma mostly occurs in bones with intra-membranous osteogenesis, most often in craniofacial bones. It is a benign tumor that develops mostly in children, more often in males, grows slowly, can stop growing as the bones mature, and is non-malignant, and its prognosis is generally good. The symptoms of this disease are usually mild, but sometimes there are symptoms due to compression, such as headache, dizziness and nasal congestion. There are two types of osteoma: dense osteoma and cancellous osteoma. Most dense osteomas protrude from the bone surface and are semicircular, mound-shaped or lobulated, with smooth margins and high density, and uniformly dense internal bone structure, with the base connected to the bone cortex. The lax type is less common and mostly occurs in the skull, showing a semicircular, flat mound-shaped outward protrusion from the cranial plate with smooth margins and an internal density resembling ground glass. The soft tissue on the surface of the osteoma also protrudes when it is raised, but it does not erode or thicken.