No abstract available.
Ethmoid Sinus*

Sinochoanal polyp is an inflammatory polyp that originates in the paranasal sinus, passes through a sinus ostium, and extends into the choana. While antrochoanal polyp is the most common type of sinochoanal polyp, sphenochoanal polyp is rare and ethmochoanal polyp is extremely more rare to find. To minimize postsurgical recurrence, it is essential to completely remove the polyp together with the base of its origin. We have recently experienced and successfully managed three cases of ethmochoanal polyp by endoscopic sinus surgery. It was difficult to histologically differentiate ethmochoanal polyp from sinonasal polyps associated with chronic rhinosinusitis. For this reason, ethmochoanal polyp should be suspected and completely removed together with the base of its origin when a large polyp originates from the ethmoid sinus and extends into the choana. Now we report three cases of ethmochoanal polyp with a brief review of the related literatures.
Ethmoid Sinus* ; Polyps* ; Recurrence

Osteoma is a tumor of mature bone showing slow growth of well-differentiated bone. It occasionally produces symptoms of space occupying lesion and symptoms of ethmoid osteoma occur earlier than that of osteoma of the frontal sinus. Osteoma of orbital area is uncommon and it may produce ophthalmologic symptoms and cosmetic problems. Treatment remains controversial: open procedures are typically being used, however, small sized ethmoid osteoma are removed by intranasal procedure. Recently, the authors have experienced a case of giant ethmoid osteoma with orbital extension, which was removed with intranasal endoscopic and external ethmoidectomy approach. Hence, we report this case with a review of literature.
Ethmoid Sinus ; Frontal Sinus ; Methods ; Orbit* ; Osteoma*

A large osteoma arising from the ethmoid sinus produced exophthalmos and diplopia. The troublesome symptoms disappeared after surgical removal of the lesion. The osteoma was an ivory type.
Diplopia ; Ethmoid Sinus ; Exophthalmos ; Orbit* ; Osteoma*

PURPOSE: As the use of computed tomographic scanning spread, the diagnosis of blow-out fractures of the medial orbital wall increased. Conventionally, the surgery of blow-out fractures in medial orbital wall was performed by various approaches with external incision or endoscopic approach. Although the field of orbital surgery has progressed significantly during the last decade, accurate realignment and replacement of component is difficult due to lack of visualization of the fracture site, blind dissection of the orbital wall, and difficulty in insertion of implant. In order to overcome these shortcomings, we explored the use of endoscopic transnasal approach together with subciliary approach. METHODS: The entrapped periorbital tissues in the ethmoid sinus were completely reduced endoscopically, and the bone defect of medial orbital wall was reconstructed with Medpor(R) insertion via subciliary approach. This technique was applied to 13 patients who had medial orbital wall fracture. RESULTS: The patients were followed-up for 3 to 24 months with an average of 9 months. The postoperative courses were satisfactory in all cases. CONCLUSION: The conjunction of endoscopic transnasal and subciliary approach technique seems to produce good results in medial orbital wall fracture.
Diagnosis ; Ethmoid Sinus ; Humans ; Orbit* ; Orbital Fractures

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

Sinus osteoma is a common nasal and sinus disease, while the clinical cases of osteoma with a diameter greater than 30 millimeter are rarely seen. This paper reports a case of a 39-years-old male patient discovered with one-year long swelling pain in the right eye. The patients' right eye was mildly prominent and he suffered from hypopsia and diplopia. After CT scanned, he have ethmoid osteoma been discovered, besides, the right media rectus compression and orbital apex compression and consequent pathologically were diagnosed. The solid tumor ranged widely from the anterior skull base to the superior and interior orbital walls,and thus deprived the patient's complete surgical resection. As an attempt to prevent complications, most parts of the tumors were sur gically removed.
Adult ; Ethmoid Sinus ; Humans ; Male ; Osteoma

Cysts ; Endoscopy ; Ethmoid Sinus ; surgery ; Humans ; Orbit

BACKGROUND AND OBJECTIVES: Incidences of postoperative mucoceles of the frontal, ethmoid, or sphenoid sinuses are currently on the rise. The clinical rogression of the postoperative mucoceles in the frontal, ethmoid, or sphenoid sinuses are different from that of the maxillary mucoceles. In this study, we investigated the clinical patterns and treatments of postoperative mucoceles, which have developed in the frontal, ethmoid, or sphenoid sinuses. MATERIALS AND METHODS: Between June,1994 and August, 2005, twenty-six patients with thirty postoperative mucoceles were treated surgically. They had a previous history of operation and incidences of maxillary mucoceles were excluded from the study. A review of the clinical subjects were performed using their clinical records and radiological findings. RESULTS: The locations of the postoperative mucoceles were, in the order of frequency, the ethmoid, frontal, fronto-ethmoid, spheno- ethmoid, sphenoid, and fronto-ethmoidsphenoid sinus. Postoperative mucoceles occurs mostly in the form of ophthalmic symptoms and headache. The ophthalmic manifestations were different between the anterior, posterior and the antero-posterior mucocele group. The mean duration until diagnosed as postoperative mucocele since the previous sinus surgery was 9.9 years, and endoscopic sinus surgeries and intranasal ethmoidectomies with Caldwell-Luc operations were the majority among previous surgeries. Most postoperative mucoceles could be successfully treated with an endoscopic marsupialization. CONCLUSION: Frontal, ethmoid, or sphenoid postoperative mucoceles developed mostly on the ethmoid sinus and occurs mainly in the form of ophthalmic symptoms. Most postoperative mucoceles were successfully treated with an endoscopic marsupialization.
Ethmoid Sinus ; Headache ; Humans ; Incidence ; Mucocele* ; Paranasal Sinuses ; Sphenoid Sinus*

PURPOSE: To determine the anatomic variations that can lead to optic nerve damage during the sugical treatment of posterior paranasal sinus lesions MATERIALS AND METHODS: two hundred optic nerves of 100 persons were examined using ostiomeatal unit CT (OMU CT). The anatomical features of this nerve and posterior paranasal sinuses were classified into four types : the optic nerve adjacent to the sphenoid sinus without indentation of the sinus wall (type 1); the optic nerve adjacent to the sphenoid sinus, causing indentation of the sinus wall (type 2); the optic nerve passing through the sphenoid sinus (type 3); and the optic nerve adjacent to the sphenoid sinus and posterior ethmoid sinus (type 4). Bony dehiscence around the optic nerve and pneumatization of the anterior clinoid process were also evaluated. RESULTS: The anatomical classification of the optic nerve and posterior paranasal sinuses was as follows : type 1, 1326 (66%); type 2, 60 (30%); type 3, 6 (3%), and type 4, 2 (1%). Bony dehiscence around the optic nerve had developed in 58 cases (29%) and pneumatization of the anterior clinoid process in 13 (6.5%). These conditions were most common in type 3 optic nerve, and second most common in type 2. CONCLUSION: The 2 and 3 optic nerve, bony dehiscence around the optic nerve and pneumatization of the anterior clinoid process are the anatomic variations that can lead to optic nerve damage during the surgical treatment of posterior paranasal sinus lesions. To prevent optic nerve damage, these factors should be carefully evaluated by OMU CT.
Classification ; Ethmoid Sinus ; Humans ; Optic Nerve* ; Paranasal Sinuses* ; Sphenoid Sinus