case_images: PMC3125644_01
case_images: Extraoral swelling on the right body of the mandible
case_images: JOMFP-15-101-g001.jpg
case_images: PMC3125644_01_JOMFP-15-101-g001.jpg
case_images: F0001
case_images: A 9-year-old boy reported to the Department of Oral and Maxillofacial Pathology, SIBAR Institute of Dental sciences, with an asymptomatic extraoral swelling on the right body of the mandible, which had been evident for 2 months [Figure 1]. It was hard and nontender on palpation [Figure 1].
case_images: Panoramic radiograph revealing faint periosteal reaction in the vicinity of permanent first molar and developing tooth buds of right canine and premolars
case_images: JOMFP-15-101-g002.jpg
case_images: PMC3125644_01_JOMFP-15-101-g002.jpg
case_images: F0002
case_images: The periosteal bone reaction was noted [Figure 2].
case_images: The axial CT view in bone window showing a massive periosteal reaction on the buccal surface, demonstrating the sclerotic borders of the lesion with soft tissue density within the central zone
case_images: JOMFP-15-101-g003.jpg
case_images: PMC3125644_01_JOMFP-15-101-g003.jpg
case_images: F0003
case_images: The lesion appears to have soft tissue density within the central zone as seen from this window, suggesting that the lesion is of soft tissue region [Figure 3].
case_images: Spindle cells arranged in interlaced fascicular pattern, showing elongated nuclei with blunt ends
case_images: JOMFP-15-101-g004.jpg
case_images: PMC3125644_01_JOMFP-15-101-g004.jpg
case_images: F0004
case_images: The cells were predominantly spindle shaped and showed elongated nuclei with fusiform or blunt ends [Figure 4].
case_images: The tumor was positive for vimentin
case_images: JOMFP-15-101-g005.jpg
case_images: PMC3125644_01_JOMFP-15-101-g005.jpg
case_images: F0005
case_images: The tumor was positive for alpha-smooth muscle actin [Figure 5] and vimentin [Figure 6] and negative for S-100 protein and desmin.
case_images: The tumor was positive for alpha-smooth muscle actin
case_images: JOMFP-15-101-g006.jpg
case_images: PMC3125644_01_JOMFP-15-101-g006.jpg
case_images: F0006
case_images: The tumor was positive for alpha-smooth muscle actin [Figure 5] and vimentin [Figure 6] and negative for S-100 protein and desmin.