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Disease / syndrome / tumor / condition
Region of interest
right side Maxillary sinus
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1. Ossifying fibroma in anterior left maxilla
There is a moderately well-defined bony growth in the anterior left maxilla, which extends into the anterior left antral space. This entity extends mesially to abut the medial wall of the maxillary sinus, and superiorly to abut the floor of the left orbit. The internal structure of this entity is composed a low-density fibrous tissue intermixed with faint, granular septae. The periphery of this entity is lined by a margin of relatively denser granular bone. The left infraorbital nerve canal courses immediately lateral to this entity, and appears to have been slightly displaced in a lateral direction. The contiguous orbital floor appears slightly expanded in a superior direction. This growth extends superomedially to encroach the left ostiomeatal unit, but there is presently no evidence of sinonasal obstruction. Taken together, these findings suggest the presence of an ossifying fibroma in the anterior left maxilla.
Axial views of the anterior left maxilla
These axial cross-sectional images demonstrate that the abnormal growth in the anterior left maxilla is composed a relatively radiolucent core that is surrounded by a margin of dense, granular bone. Faint granular septae are observed within this internal radiolucent region, which infers immature bone formation within a predominantly fibrous core. The left infraorbital nerve canal passes lateral to this entity, and appears slightly bowed out in a lateral direction, which infers the presence of displacement.
Coronal views of the anterior left maxilla
These coronal cross-sectional images demonstrate that this entity has expanded the left orbital floor, and has caused superior displacement of this structure. The floor of the orbit remains intact, despite this finding. This entity also extends superomedially to encroach the region of the left maxillary ostium, but there is presently no evidence of obstruction.
Sagittal views of the left maxilla
These sagittal cross-sectional images demonstrate that this abnormal growth has occupied the anterior one-third of the left antral space. It extends posteriorly to a region that is apical to tooth 26. Note that the remaining antral space is well-aerated, which suggests that there is presently no evidence of obstruction in sinonasal drainage.
Impacted tooth 38
Tooth 38 is mesioangularly impacted and partially captured in this imaging volume. The left inferior alveolar nerve canal passes immediately buccal to the apical thirds of the roots of this tooth. There is no evidence of nerve compression, despite this finding. The periodontal ligament space is not completely visualized around the root circumference of this impacted tooth, which suggests the possibility of ankylosis. The residual follicle surrounding the crown of tooth 38 appears hypoplastic.