Figure 2: (a) Noncontrast computed tomography brain showing a well defined iso to hyperdense extracranial calvarial lesion in the left frontoparietal area with bone destruction and intracranial extension into the left parietal lobe (b) Gross image showing tumor mass along with circumferentially attached scalp and underlying bone. (c and d) Histopathology showing tumor cells in large multi layered fronds, nests, and sheets. (H and E ×100) (e) Histopathology showing moderately pleomorphic tumor cells laying down lacy matrix of osteoid (H and E ×200) (f) Cells show nuclear immunopositivity for SATB2 and immunonegativity for cytokeratin (inset)