case_images: PMC3917367_01
case_images: Preoperative neuroradiological examinations. A: Coronal section of computed tomography. An isodense mass protruded through a part of the right ethmoid bone (arrow). B: Bone window computed tomography. A bone defect was noted in the corresponding region (arrow). C: Three-dimensional computed tomography. A round bone defect was present in the ethmoid bone (arrow). D: Magnetic resonance imaging. An isodense mass protruding through the ethmoid bone and a partial cystic component were noted.
case_images: 1752-1947-8-24-1.jpg
case_images: PMC3917367_01_1752-1947-8-24-1.jpg
case_images: F1
case_images: An isodense mass protruding through a part of the ethmoid bone of his right anterior skull base was noted in the coronal section on computed tomography (CT) (Figure 1A), and a bone defect was present in the corresponding region on bone window CT (Figure 1B). A round bone defect with a 10mm diameter was noted in the ethmoid bone of his right anterior skull base on three-dimensional CT (Figure 1C), and an isodense mass protruding through the ethmoid bone and a partial cystic component were also observed on magnetic resonance imaging (Figure 1D).
case_images: Surgical photograph. A: Brain tissue and a cystic component protruded into the paranasal sinus through the right ethmoid bone defect. B: After resection of the protruding brain tissue, the defective dura mater region was patched with an unvascularized temporal fascia flap.
case_images: 1752-1947-8-24-2.jpg
case_images: PMC3917367_01_1752-1947-8-24-2.jpg
case_images: F2
case_images: Brain tissue and its cystic component protruded into his paranasal sinus through the defective region of the ethmoid bone (Figure 2A). After resecting the protruding brain tissue, the defective dura mater region was patched with an unvascularized temporal fascia flap (Figure 2B).