No abstract available.
Ethmoid Bone* ; Meningitis, Bacterial*

Ectopic periorbital meningioma which is not originated form the optic nerve sheath is rare among the primary intraorbital meningioma and its pathogenesis is not still clear. We present one case of ectopic periorbital meningioma with the review of literatures. The tumor was removed by transcranial approach and confirmed that it was attached the anterior and lateral portion of the ethmoid bone.
Ethmoid Bone ; Meningioma* ; Optic Nerve

With 4-7 cases of Rhinonasal polypsis in Eto-rhino-laryngologic center, from January 1998 to January 2001, in the age of 16-60 years. The ethmoidectomy via endoscopic technique and receive high efficacy result: 97% decrease nasal obstruction post op, 0% of orbital and intracranial complications, and specially 27% has appeared the minimal recurrent polyps on the anterior ethmoid which did not remove, just only use the steroid spray. Preparing the pre-op period with antibiotic, anti-inflammatory 93.7% and planned regularly patient's examination each month per year. Others factors such as asthma 13%, allergic zhinitis 24%, tobacco 15% were well studied to improve the result of the endoscopic ethmoidectomy and to limit the recurrent polyps
Endoscopy ; surgery ; therapeutics ; Ethmoid Bone

OBJECTIVE: We often observe the variation of Crista galli (CG) which lies in the midline above the cribriform plate on computed tomography (CT) scans. We investigated the variations in CG and the factors which affect its pneumatization. MATERIALS AND METHODS: We analyzed the CT images of 818 chronic rhinosinusitis patients between July 2003 and July 2011. We investigated height, position relative to the cribriform plate, degree of pneumatization, and cell origin for the pneumatization in CG. We analyzed the relationship between several factors (age, sex, and position of CG) and pneumatization of CG. RESULTS: The average height of CG was 17.98 mm. In 13.9% of subjects, the base of CG did not extend below the level of the cribriform plate. In 84.2%, CG extended less than 50% of its height below the cribriform plate. In 1.8%, CG extended more than 50% of its height below the cribriform plate. Pneumatization of CG was found in 12.2%. Except one, every pneumatization was connected with the frontal sinus. The rate of pneumatization was significantly different depending on age. CONCLUSION: Our study demonstrated that CG showed various morphology and pneumatizaiton. The pneumatization of CG was mainly originated from frontal sinus and related to aging.
Aging ; Ethmoid Bone ; Frontal Sinus ; Humans

Fibrous dysplasia is a benign bone lesion characterized by the replacement of the normal substances of the interior of the bone by fibroosseous connective tissue histologically exhibiting varying degrees of osseous metaplasia. Craniofacial dysplasia represents approximately 2.5% of all bone tumors and 7.5% of benign bone tumors. Craniofacial dysplasia frequently affects the maxilla and frontal bone and induces local facial swelling and exophthalmos. The dysplasia has predilection for membranous bone such as femur or tibia, so its origin in the ethmoid is very rare. Recently, we experienced a case of fibrous dysplasia originating in the ethmoid bone extending to intracranial region. Our case demonstrated a huge bony lesion involving right ethmoid, frontal and sphenoid bone and extending to the left frontal area extensively forming a large dumbbell shaped cyst with thin calcified wall. There are no reported cases of fibrous dysplasia forming huge cyst in the intracranial region internationally. Hence, we report a case of fibrous dysplasia of ethmoid sinus forming the intracranial huge cyst.
Connective Tissue ; Ethmoid Bone* ; Ethmoid Sinus ; Exophthalmos ; Femur ; Frontal Bone ; Maxilla ; Metaplasia ; Sphenoid Bone ; Tibia

Chondromyxoid fibroma (CMF) is a relatively rare bone tumor that was first described by Jaffe and Lichtenstein in 1948. CMF of the sinonasal tract is very rare. A 28-year-old male presented with long-standing, intermittent, pulsatile pain in the right temporal area. A computed tomography scan showed a 20 x 19 mm round, bony density in the right ethmoid sinus with fluid collection in the ethmoid and frontal sinuses. Additionally, a cystic lesion with surrounding edema was found in the right frontal lobe. The patient underwent a partial ethmoidectomy and frontostomy. A histological examination showed polygonal and stellate cells in a myxoid and chondroid background with a pattern of lobulation and plaque-like calcification. The bone lesion was revealed as a CMF of the ethmoidal sinus, and the frontal lobe cystic lesion was a brain abscess associated with the CMF. We present the case of a CMF of the ethmoid sinus complicated by a brain abscess.
Adult ; Brain ; Brain Abscess ; Edema ; Ethmoid Bone ; Ethmoid Sinus ; Fibroma ; Frontal Lobe ; Frontal Sinus ; Humans ; Male

Chondromyxoid fibroma (CMF) is a relatively rare bone tumor that was first described by Jaffe and Lichtenstein in 1948. CMF of the sinonasal tract is very rare. A 28-year-old male presented with long-standing, intermittent, pulsatile pain in the right temporal area. A computed tomography scan showed a 20 x 19 mm round, bony density in the right ethmoid sinus with fluid collection in the ethmoid and frontal sinuses. Additionally, a cystic lesion with surrounding edema was found in the right frontal lobe. The patient underwent a partial ethmoidectomy and frontostomy. A histological examination showed polygonal and stellate cells in a myxoid and chondroid background with a pattern of lobulation and plaque-like calcification. The bone lesion was revealed as a CMF of the ethmoidal sinus, and the frontal lobe cystic lesion was a brain abscess associated with the CMF. We present the case of a CMF of the ethmoid sinus complicated by a brain abscess.
Adult ; Brain ; Brain Abscess ; Edema ; Ethmoid Bone ; Ethmoid Sinus ; Fibroma ; Frontal Lobe ; Frontal Sinus ; Humans ; Male

Nasal chondromesenchymal hamartoma is a distinctive mixed mesenchymal lesion of sinonasal region with a complex histologic appearance and benign clinical course and clinicopathologically similar to those of the mesenchymal hamartoma of the chest wall of infancy. We report a case of nasal chondromesenchymal hamartoma occurred in the right nasal cavity in a 3-month-old female. She was admitted with a history of profuse nasal bleeding and obstruction. CT revealed complex solid and cystic mass, measuring 3.5x2.5x2.5 cm in dimensions which filled the right nasal cavity and extended into ethmoid sinus and cribriform plate. The received piecemeal fragments of tissue were brown tan-colored firm semitranslucent tissue with a cartilaginous appearance. Microscopically, the basic morphologic elements were irregular islands of hyaline cartilage and myxoid to spindle cell stroma with various cellularity.
Epistaxis ; Ethmoid Bone ; Ethmoid Sinus ; Female ; Hamartoma* ; Humans ; Hyaline Cartilage ; Infant ; Islands ; Nasal Cavity ; Thoracic Wall

BACKGROUND AND OBJECTIVES: As the endoscopic sinus surgery continues to gain popularity, the application of endoscopic sinus surgery has extended to children. The knowledge about the variation of the paranasal sinuses in children is essential to perform sinus operations without complication. To identify the difference of the paranasal sinuses between children and adults, we have measured the cribriform plate, the ethmoid roof (lateral lamella of the lamina cribrosa), the width of the anterior ethmoid sinus and the position of the sphenoid sinus. MATERIAL AND METHODS: Ostiomeatal unit CT scans of the paranasal sinuses obtained in consecutively imaged cases were analysed. The subjects were 58 children who were divided into two groups. One group had 22 children from ages 4 to 10 and the second group had children from ages 11 to 16. RESULTS: The length of the lateral lamella was 4.5+/-1.6 mm (group 1) and 5.4+/-2.9 mm (group 2). The depth of the lateral lamella was 4.1+/-1.4 mm (group 1) and 5.3+/-2.2 mm (group 2). The width of the cribriform plate was 2.5+/-0.9 mm for Group 1 and 2.8+/-0.9 mm for Group 2. The width of upper portion in the anterior ethmoid sinus was 7.9+/-2.1 mm for Group 1 and 9.2+/-2.9 mm for Group 2. The width of lower portion in the anterior ethmoid sinus was 9.7+/-2.2 mm for Group 1 and 13.5+/-3.1 mm for Group 2. The front of the sphenoid sinus was 45.9+/-6.6 mm from the anterior nasal spine for Group 1 and 50.9+/-7.1 mm for Group 2. CONCLUSION: Since the length and depth of the lateral lamella in children were greater than the reported lengths in the adults, it is suggested that the lateral lamella in children is more prone to danger than in adults. The distance between the anterior nasal spine and anterior face of the sphenoid sinus in children was 5 to 10 mm shorter than in the adults.
Adult ; Child* ; Ethmoid Bone ; Ethmoid Sinus ; Humans ; Paranasal Sinuses* ; Sphenoid Sinus ; Spine ; Tomography, X-Ray Computed

Endoscopic skull base surgery has undergone rapid advancement in the past decade moving from pituitary surgery to suprasellar lesions and now to a myriad of lesions extending from the cribriform plate to C2 and laterally out to the infratemporal fossa and petrous apex. Evolution of several technological advances as well as advances in understanding of endoscopic anatomy and the development of surgical techniques both in resection and reconstruction have fostered this capability. Management of benign disease via endoscopic methods is largely accepted now but more data is needed before the controversy on the role of endoscopic management of malignant disease is decided. Continued advances in surgical technique, navigation systems, endoscopic imaging technology, and robotics assure continued brisk evolution in this expanding field.
Ethmoid Bone ; Paranasal Sinuses ; Robotics ; Skull ; Skull Base