PMC4012105_01
Cone-beam computed tomography shows a unilocular lesion surrounding the crown of impacted 43 and extending along the mesial aspect of the root (circumferential type)
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F1
Cone-beam computed tomography was also performed and revealed involvement of roots of 42, 41, 31, 32, 33, 34, 35 and mesial root of 46 [Figure 1].
Gross finding of a tooth within a cystic bag filled with keratinaceous material
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F2
Macroscopically, a cyst in-toto with a tooth, measuring 40 x 30 x 40 mm in size [Figure 2] and four bits of tissue curetted from the surgical site were sent for histopathological evaluation.
Focal areas of keratinizing cystic lining epithelium exhibiting a prominent granular cell layer. The cystic lumen is filled with keratinaceous material (H and E, x10)
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F3
The lumen exhibited keratin flakes [Figure 3].