Leontiasis ossea, a.k.a. “lion face”
Leontiasis Ossea, also known as leontiasis or lion face, is a rare medical condition, characterized by an overgrowth of the facial and cranial bones. It is not a disease in itself, but a symptom of other diseases, including Paget’s disease, fibrous dysplasia, hyperparathyroidism and renal osteodystrophy.
In the somewhat less common form of this rare disease the overgrowth of bone affects all the cranial bones as well as those of the face, the senses being lost one by one and death finally resulting from cerebral pressure. There is no treatment other than exposing the overgrown bone, and chipping away pieces, or excising entirely where possible.