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Skull with leontiasis ossea ("Lion face"). This rare condition is symptomatic of several diseases including fibrous dysplasia, Paget's disease, hyperparathyroidism, syphilitic osteoperiostitis and renal osteodystrophy. The condition is characterized by an overgrowth of bone (hyperostosis) in the facial and cranial bones.

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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…

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strangeremains - Lion Face: A Rare Condition Characterized By Overgrown Facial Bones • L: chronic infection set off frontal & maxillary bossing in 25-year-old man afflicted by Leontiasis ossea [Wikipedia image] • R: skull, Bologna's Museum for history of science [image Scott Haddow]

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Leontiasis ossea -largely historical term used to describe a number of conditions which result in affected patient's face resembling that of a lion. Although it is most frequently associated w craniofacial fibrous dysplasia, it has a broader meaning encompassing other lesions that have similar appearance.

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Leontiasis ossea, or lion face, is an overgrowth of the facial and cranial bones caused by disease. Your head would weigh a ton!

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