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. 2021 May 17;26(3):184–187. doi: 10.4103/jiaps.JIAPS_84_20

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Copyright: © 2021 Journal of Indian Association of Pediatric Surgeons

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(a) Gross specimen of the resected tumor with the cut surface showing bony spicules and soft tissue. The inked surface of the tumor is seen on the right side of the picture. (b) Island of benign bone (arrows) surrounded by spindle cells and epithelioid cells. H and E, stain (×400). (c) Widespread positive staining for SAT B2 showing the osteoblastic origin of the lesion. Immunohistochemistry staining for SAT B2 (×100). (d) Ki67 positive staining showing the highly proliferative nature of the lesion. Immunohistochemistry staining for Ki 67 (×100)