PMC5817807_01
Panoramic radiograph shows a single large radiolucent lesion with well-defined border.
CRIRA2018-6987050.001.jpg
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fig1
Because of the lesion, the roots of the left lateral mandibular incisor and canine were deviated and resorbed (Figures 1 and 2(c)).
(a) Axial sections show that mental foramen is not involved but has close contact with border of the lesion at the left side. (b) Cross-sectional CBCT images reveal radiopaque spots inside the lesion indicated by white arrows in the image. (c) Three-dimensional volumetric surface rendering.
CRIRA2018-6987050.002.jpg
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fig2
Because of the lesion, the roots of the left lateral mandibular incisor and canine were deviated and resorbed (Figures 1 and 2(c)). The shadow of cervical spine was superimposed over the central part of the lesion (Figure 2(b)). Axial slice showed expansion of buccal and lingual cortical plates in the anterior mandible with perforation along the outer cortical plate at the left side (Figure 2(a)).
(a) On gross examination the lesion appears as an elliptical tissue, with 3.5 x 2.7 cm diameter. Cut section reveals a solid mass with multiple cystic spaces. (b) Low power view demonstrating a thick capsule surrounding the tumor (x40). (c) Duct-like structures which are the characteristic feature of AOT indicated by yellow arrow (400). (d) Spindle shaped cells that form whorled masses and rosette-like structures are noticeable (x400).
CRIRA2018-6987050.003.jpg
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fig3
Microscopically, epithelial cells were arranged as spindle shaped cells in sheets and trabecular pattern and can form duct-like and rosette-like structures in a scant hyalinized stroma (Figure 3(d)). On gross examination the lesion appears as an elliptical tissue, measuring about 3.5 x 2.7 cm in size (Figures 3(a) and 3(b)). Small islands of tumoral cells have infiltrated the fibrous capsule (Figure 3(c)).