case_images: PMC5327765_01
case_images: Preoperative coronal CT scan demonstrating evidence of soft tissue density consistent with known inverting papilloma in ethmoid (a) and frontal (b) sinuses.
case_images: CRIOT2017-4935123.001.jpg
case_images: PMC5327765_01_CRIOT2017-4935123.001.jpg
case_images: fig1
case_images: She was found to have a recurrent inverting papilloma of the left frontal and ethmoid sinuses (Figure 1).