PMC2996001_01
Axial computed tomography images showing expansion and thinning of the bony sinus wall that was absent at places
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Computed tomography scan demonstrated a large lesion of the right maxillary sinus measuring 6 cm x 5 cm in dimension [Figure 1].
Coronal computed tomography images: an unerupted maxillary canine was seen near the mesial wall
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An unerupted maxillary canine was seen near the mesial wall [Figure 2].
Photomicrograph showing reduced enamel epithelium two to three cell thick supported by loose bland connective tissue stroma (H and E, x40).
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A small bony window of approximately 5 mm x 5 mm was made within the portion of labial plate that corresponded to the upper right central incisor. An incisional biopsy was performed and a histological diagnosis of dentigerous cyst with nonkeratinized epithelial lining and fibrous connective tissue was made [Figure 3].
Picture showing the bony window within the portion of the labial plate
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The mass was enucleated completely along with the embedded canine and the specimen was submitted for histopathological examination [Figures 4 and 5].
Enucleated specimen along with the embedded canine
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The mass was enucleated completely along with the embedded canine and the specimen was submitted for histopathological examination [Figures 4 and 5].
Gross examination revealed a cystic lesion measuring 6 cm x 5 cm x 4 cm
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Gross examination revealed a cystic lesion measuring 6 cm x 5 cm x 4 cm [Figure 6].
Gross specimen showing tan-colored thickenings in the wall of the cystic lesion
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The cyst wall demonstrated tan-colored nodular thickenings in some areas [Figure 7].
Photomicrograph showing the adenomatoid odontogenic tumor located in the fibrous capsule of the dentigerous cyst (H and E, x10)
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Sections of the solid tissue containing histological characteristics of AOT were found in the fibrous capsule of the dentigerous cyst [Figure 8].
Photomicrograph showing the cribriform area showing cords of cells surrounding loose edematous connective tissue stroma (H and E, x40)
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In certain areas, cubical cells were arranged in a cribriform or lace-like pattern showing cords of cells with associated hyaline material surrounded by a loose oedematous vascular stroma [Figure 9].
Photomicrograph showing the tubular structure enclosing a central space lined by columnar cells (H and E, x40)
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This epithelium was continuous with the cuboidal or columnar cells of the odontogenic epithelium, forming nests or rosette-like structures [Figure 10].
Photomicrograph showing cuboidal and columnar cells of the odontogenic epithelium forming rosette-like structures (H and E, x40)
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In other areas, tubular structures enclosing a central space lined by columnar cells were also seen [Figure 11].