Figure 1: (a) Orthopantomogram showing unilocular radiolucency in the mandibular region from the first premolar to the second molar. (b) Gross photograph of mandibulectomy specimen with an ill-defined gray-white lesion involving the body of mandible. (c) Microphotograph of CCOC of mandible (H&E, 4×). (d) Microphotograph showing lobules and small nests of peripheral basaloid cells with hyperchromatic nuclei and central clear cells (H&E, 40×). (e) Microphotograph of clear cells infiltrating the rib bone. (f) Microphotograph of cytokeratin (PCK) showing strong and diffuse membranous stain (IHC stain, 40×). (g) Microphotograph of cytokeratin 5/6 showing membranous stain (IHC Stain, 40×). (h) Microphotograph of PAX 8 showing negative stain (IHC stain, 40×). H&E = Haematoxylin and Eosin