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Figure 1: (a) Photograph of tumor in the right parietal region; (b) axial plain computed tomography (CT) bone - window showing defect in right parietal bone with smooth sclerotic margins; (c) CT scan brain - window showing a lobulated soft tissue lesion (with hemorrhagic areas) at the bone defect with intracranial and extracranial extension; (d) postcontrast CT showing enhancing and necrotic foci; (e) magnetic resonance imaging scan axial T1WI; and, (f) fluid - attenuated inversion recovery image revealing the bone defect; (g) gradient - echo image showing hemorrhage as blooming; (h) sagittal T2WI showing the lesion in association with the bone defect; (i) postcontrast coronal T1WI showing heterogeneous enhancement with necrotic areas. Note the mass effect on adjacent brain and enhancement along adjacent dura (dural tail); (j) H and E stain section showing fusiform and spindly tumor cells with pleomorphic hyperchromatic nuclei; (k) spindle cells with elongated nuclei arranged in fascicles and dilated vascular spaces with staghorn appearance; (l) immunohistochemistry showing strong S100 positivity of tumor cells; and, (m) diffuse and strong positivity of vimentin

Figure 1: (a) Photograph of tumor in the right parietal region; (b) axial plain computed tomography (CT) bone - window showing defect in right parietal bone with smooth sclerotic margins; (c) CT scan brain - window showing a lobulated soft tissue lesion (with hemorrhagic areas) at the bone defect with intracranial and extracranial extension; (d) postcontrast CT showing enhancing and necrotic foci; (e) magnetic resonance imaging scan axial T1WI; and, (f) fluid - attenuated inversion recovery image revealing the bone defect; (g) gradient - echo image showing hemorrhage as blooming; (h) sagittal T2WI showing the lesion in association with the bone defect; (i) postcontrast coronal T1WI showing heterogeneous enhancement with necrotic areas. Note the mass effect on adjacent brain and enhancement along adjacent dura (dural tail); (j) H and E stain section showing fusiform and spindly tumor cells with pleomorphic hyperchromatic nuclei; (k) spindle cells with elongated nuclei arranged in fascicles and dilated vascular spaces with staghorn appearance; (l) immunohistochemistry showing strong S100 positivity of tumor cells; and, (m) diffuse and strong positivity of vimentin