Fig. 1From: Osteosarcoma of the sphenoid sinus extending to ethmoid sinus—report of a rare case with review of literature giving special emphasis on treatment and outcomePreoperative contrast CT (a, b, c) and contrast MRI (d, e, f) shows an expansile lytic cystic lesion with peripheral rim enhancement in the region of the posterior ethmoidal and sphenoid sinusBack to article page