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Related to Leontiasis Ossea: porphyria, platybasia


n. pl. meg·a·ceph·a·lies

meg′a·ce·phal′ic (-sə-făl′ĭk), meg′a·ceph′a·lous (-sĕf′ə-lĕs) adj.


(ˌmɛɡəˈsɛfəlɪ) or


(Pathology) the condition of having an unusually large head or cranial capacity. It can be of congenital origin or result from an abnormal overgrowth of the facial bones. Compare microcephaly
megacephalic, ˌmegaˈcephalous, ˌmegaloceˈphalic, ˌmegaloˈcephalous adj
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.megacephaly - an abnormally large headmegacephaly - an abnormally large head; differs from hydrocephalus because there is no increased intracranial pressure and the overgrowth is symmetrical
abnormalcy, abnormality - an abnormal physical condition resulting from defective genes or developmental deficiencies
References in periodicals archive ?
It leads to bones that are weak and prone to expansion, which in turn can cause leontiasis ossea (lion face syndrome).
Renal osteodystrophy in the setting of hyperparathyroidism, leontiasis ossea pattern.
Fibrous dysplasia involving the face and skull is called "Leontiasis ossea." Without treatment, one or more bones progressively increase in size and move into the cavities of the eye, mouth and/or the nose and its sinuses.