M85.2: Hyperostosis of skull

Hyperostosis of the skull is a condition characterized by an abnormal thickening or excessive growth of bone in the skull. This thickening often happens due to excessive deposit of calcium at places where it shouldn't be. Notably, it's not a form of cancer and the condition does not spread from one area to another. Symptoms may vary based on the areas of the skull that are affected but can include headaches, facial pain, or hearing problems if the bones around the ears grow too much. People with this condition may also have difficulty wearing hats or helmets due to changes in the shape of the skull. This condition is often discovered through imaging tests for other conditions, such as X-rays or CT scans. The progression of this disease varies from person to person and can be slow or rapid. Hyperostosis of the skull primarily impacts the skeletal system but may affect other systems depending on where the excessive growth occurs.