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Case 109494

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Referral category

Disease / syndrome / tumor / condition

Region of interest

46/41

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Canaray 109494

1. Fibrous dysplasia with simple bone cyst formation

There is a moderately well-defined region of irregular bone pattern in the posterior right mandible which is partially captured in this imaging volume. The buccal and lingual surfaces of the mandibular body appear expanded in this region, and their cortices appear thinned, but intact. The bone pattern in this region appears heterogeneous, and is composed of low-density granular bone intermixed with sclerotic bone. Well-defined and delicately corticated radiolucencies are also evident in this area, which appear to scallop around the roots of teeth 46 and 47, and also along the endosteal surfaces of the contiguous cortical plates. The lamina durae of teeth 46 and 47 appear mostly intact, and there is no evidence of root resorption. The mandibular nerve canal appears superiorly displaced by this entity, but its cortices appear intact. These findings suggest the presence of fibrous dysplasia with simple bone cysts. Complete imaging of this entity may reveal additional diagnostic information. Continued radiographic monitoring is recommended.

Axial views of the posterior right mandible

These axial cross-sectional images demonstrate the presence of a moderately well-defined region of irregular bone pattern in the posterior right mandibular body. This bone pattern is composed of regions of low-density granular bone intermixed with sclerotic bone. Well-defined and delicately corticated radiolucencies are also evident in this area, which appear to scallop around the roots of teeth 46 and 47. Note that the lamina durae lining the root circumferences of these teeth appear mostly intact, and there is no evidence of root resorption.

Buccolingual views of the posterior left mandible

These buccolingual cross-sectional images demonstrate that the buccal and lingual surfaces of the posterior right mandibular body appear expanded in an irregular fashion, without a definite epicenter of growth. The contiguous buccal and lingual cortical plates appear thinned, but remain intact.

Mesiodistal views of the posterior right mandibular body

These mesiodistal cross-sectional images demonstrate that the right inferior alveolar nerve canal has been slightly displaced in a superior direction by this entity. The cortices of the mandibular canal appear intact. Inferior displacement of the inferior mandibular border is also evident, and the inferior mandibular cortex appears thinned in this region, but remains intact. Note the scalloping of the cyst-like entities around the roots of teeth 46 and 47, which is a characteristic feature of simple bone cysts.