PMC7599364_01
Panoramic radiograph revealing an impacted mandibular left third molar with a well-defined, round, unilocular radiolucent lesion surrounding the crown.
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A panoramic radiograph discloded an impacted mandibular left third molar with an unilocular radiolucency around the crown (Fig. 1).
CBCT showing the presence of an unilocular lesion surrounding the crown of the mandibular left third molar. The lesion expands into vestibular and lingual cortical bones. It extends downwards thereby entering into contact with the left inferior alveolar nerve.
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It extends downwards thereby entering into contact with the left inferior alveolar nerve (Fig. 2).
A Cystic light (*). Cystic wall with islets which represent carcinological infiltration ( ) (HES x25). B Centered section of the cystic wall infiltrated by the carcinoma (HES x100). C Immunohistochemistry : nuclear expression of p40 by tumor cells infiltrating the cyst wall (x100). D Immunohistochemistry : Ki67 staining at 20% in hot spot (x100).
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On immunochemistry analysis, tumoral cell proliferation expressed P40 marker and Ki67 rated at 20% (Fig. 3).