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  Indian J Med Microbiol
 

Figure 1: (a and b) On axial nonenhanced brain computed tomography image, well defined, ground glass density, expansile lesion containing both sclerotic and fibrous component in left ethmoidal and frontal sinuses extending to left frontoethmoidal recess. Note the scalloping of the left ethmoid and frontal sinus cortex due to sclerotic component (green arrow). At lateral and posterior part of the lesion ground glass fibrous component is seen (red arrow). (c and d) The tumour is composed of numerous irregularly shaped bony trabeculae in loose fibrous stroma (black arrow). Prominent osteoblastic rimming (green arrow) of the anastomosed trabeculae (blue arrow) are evident (H and E, original magnification ×200)

Figure 1: (a and b) On axial nonenhanced brain computed tomography image, well defined, ground glass density, expansile lesion containing both sclerotic and fibrous component in left ethmoidal and frontal sinuses extending to left frontoethmoidal recess. Note the scalloping of the left ethmoid and frontal sinus cortex due to sclerotic component (green arrow). At lateral and posterior part of the lesion ground glass fibrous component is seen (red arrow). (c and d) The tumour is composed of numerous irregularly shaped bony trabeculae in loose fibrous stroma (black arrow). Prominent osteoblastic rimming (green arrow) of the anastomosed trabeculae (blue arrow) are evident (H and E, original magnification ×200)