case_images: PMC5526228_01
case_images: Clinical examination showing his black teeth with enhancing accumulations of plaque calculus. No abnormal protuberance in gingival cheek groove.
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case_images: F1
case_images: On physical examination, his teeth were black with enhancing accumulations of plaque calculus (Figure 1).
case_images: The panoramic radiography of the jaw was normal.
case_images: fneur-08-00343-g002.jpg
case_images: PMC5526228_01_fneur-08-00343-g002.jpg
case_images: F2
case_images: The panoramic radiography of the jaw was normal (Figure 2).
case_images: The mandibular computerized tomography scan showing destruction in the body of mandibular bone and a mass in the surrounding soft tissue.
case_images: fneur-08-00343-g003.jpg
case_images: PMC5526228_01_fneur-08-00343-g003.jpg
case_images: F3
case_images: It revealed destruction in the body of mandibular bone and a mass in the surrounding soft tissue, which was considered as a possible malignancy, most likely to be the gingival cancer (Figure 3).
case_images: Positron emission tomography combined with computed tomography from the cerebellum to the upper thighs showing increased uptake in the mandibular bone body especially in the left mandible. No abnormal uptake in distant sites.
case_images: fneur-08-00343-g004.jpg
case_images: PMC5526228_01_fneur-08-00343-g004.jpg
case_images: F4
case_images: A positron emission tomography combined with computed tomography (PET-CT) from the cerebellum to the upper thighs showed increased uptake in the mandibular bone body especially in the left mandible (Figure 4).
case_images: Histopathological examination of the biopsy specimen showing infiltration of carcinoma cells with nest-like distribution. The carcinoma cells, round and oval in shape and most in mitosis, were abundant of cytoplasm [H&E (A) 40x and (B) 100x].
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case_images: PMC5526228_01_fneur-08-00343-g005.jpg
case_images: F5
case_images: The histopathological examination showed infiltration of carcinoma cells with nest-like distribution in the fibrous tissue and bone (Figure 5).