• Imaging Science in Dentistry
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• 제52권1호
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• pp.109-115
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• 2022

Purpose: The aim of this study was to evaluate the prevalence of clinically relevant anatomical variations of the ethmoid sinuses and their potential association with ethmoid and maxillary sinus pathologies on cone-beam computed tomography (CBCT) scans. Additionally, potential associations with different sides and demographic factors, including age and sex, were evaluated. Materials and Methods: In total, 273 CBCT scans with complete ethmoid and maxillary sinuses were analyzed to determine the prevalence of Agger nasi cell, supraorbital ethmoid cell, Haller cell, Onodi cell, and ethmomaxillary sinus. In addition, the health or pathology of the ethmoid and maxillary sinuses was also recorded to assess correlations with the aforementioned variations. Results: The prevalence of Agger nasi cell was found to be the highest (95.6%) in this study, followed by Onodi cell (60.4%), Haller cell (29.3%), and supraorbital ethmoid cell (19.4%). Ethmomaxillary sinus was the least common finding (16.5%). Males and persons above 61 years of age had a significantly higher frequency of supraorbital ethmoid cell and Onodi cell, respectively. However, no significant relationships were noted between anatomical variations of the ethmoid sinus and pathologies of the ethmoid or maxillary sinus. Conclusion: There was a high prevalence of ethmoid sinus variations in this Southern Chinese population. The prevalence of Agger nasi cell and Onodi cell was higher than that of other anatomical variations of the ethmoid sinuses. Anatomical variations of the ethmoid sinuses were not associated with ethmoid or maxillary sinus pathologies in this patient cohort.

• 대한기관식도과학회지
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• 제4권2호
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• pp.244-248
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• 1998

Osteomas are uncommon benign turners, occasionally located in the paranasal sinuses, of which the frontal and ethmoid sinus is the most frequent site. The etiology of the osteoma is still unknown but three possible theories have been proposed; embryological, traumatic and infective. The most common symptoms of osteoma are facial pain and headache, but most of them are asymptomatic and discovered incidentally on routine sinus radiography. Recently, the authors experienced two cases of large osteoma of the ethmoid sinus that were removed successfully by external ethmoidectomy.

• 대한두경부종양학회지
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• 제32권2호
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• pp.51-54
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• 2016

Schwannomas are benign neurogenic tumors arising from the peripheral nerve sheath and rare in the nasal cavity and paranasal sinus. About 4% of schwannomas in the head and neck area arise in the sinonasal cavity. As unilateral nasal masses in the nasal cavity and paranasal sinus, schwannomas are likely to be mistaken for more common lesions such as nasal polyps or mucoceles. We recently experienced a case of schwannoma on the ethmoid sinus in a 33-year-old male which was surgically removed. Herein, we report this unusual case of schwannoma on the ethmoid sinus with a brief review of literature.

• Anatomy and Cell Biology
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• 제56권2호
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• pp.179-184
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• 2023

The Functional endoscopic sinus surgery through transnasal approach is a common modality of treatment for disorders of the nasal cavity, paranasal air sinuses as well as cranial cavity. The olfactory fossa (OF) is located along the superior aspect of cribriform plate which varies in shape and depth. This variable measurement of the depth of OF is mostly responsible for greater risk of intracranial infiltration during endoscopic procedures in and around the nasal cavity. The morphology of frontal and ethmoid sinus (ES) vary from simple to complex. This cadaveric study is planned to improve the ability of the otolaryngologist, radiologist to understand the possible morphological variations and plan steps of less invasive "precision surgery" to have a safe and complication free procedures. A total of 37 human head regions were included in the study. For classification of OF, Modified Kero's classification was used. The size, shape and cells of frontal and ES were noted. We found, type II (60.8%) OF was more common followed by type I (29.7%) than type III (9.5%). The shape of frontal sinus was comma shaped (55.4%) followed by oval (18.9%) than irregular (16.2%). Most common two cells type of ES was seen in 50.0% of both anterior and posterior ES. Out of 74 ES, 8.1% of Onodi cells and 14.9% of agger nasi cells were seen.

• 치과방사선
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• 제29권2호
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• pp.459-475
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• 1999

Objectives : The purpose of this study is to evaluate the computed tomographic (CT) images of the paranasal sinusitis(PNS). Materials and Methods : The author examined the extent and recurring patterns of the paranasal sinusitis and some important anatomic landmarks. The author analyzed PNS images retrospectively in 500 patients who visited Chonbuk National University Hospital between January 1996 and December 1997. Results : The most frequently affected sinus was maxillary sinus (82.9％), followed by anterior ethmoid sinus(67.9％), posterior ethmoid sinus(48.9％), frontal sinus(42.0％) and sphenoid sinus(41.4％). The characteristic features of CT images of the sinusitis were sinus opacification(22.4％), mucoperiosteal thickening(34.3％), and polyposis(2.0％). Sinonasal inflammatory diseases were categorized into 5 patterns according to Babber s classification. They were 1) infundibular(13.0％), 2) ostiomeatal unit(67.4％), 3) sphenoethmoidal recess (13.0％), 4) sinonasal polyposis (9.6％) and 5) unclassifiable patterns(18.0％). The incidences of contact between sinus and optic nerve were as follows ; the incidences of contact with posterior ethmoid sinus, sphenoid sinus. both posterior sinuses were 11.4％. 66.8％, 6.3％. respectively. The incidences of contact between sphenoid sinus and maxillary nerve, vidian nerve, internal carotid artery were 74.5％. 79.2％. 45.1％. respectively. The incidences of pneumatization of the posterior ethmoid sinus were as follows ; normal 70.6％ and overriding type 29.4％. The incidences of sphenoid sinus pneumatization were as follows; normal 56.9％ , rudimentary 12.5％, pterygoid recess 22.7％, anterior clinoid recess 2.7％, and both pterygoid and anterior clinoid recess type 5.2％. Conclusions : The inflammatory sinonasal diseases were classified into five patterns using the CT of PNS, which was proven to be an excellent imaging modality providing detailed information about mucosal abnormality, pathologic patterns, and the proximity of the important structures to the posterior paranasal sinuses. This result will aid in the interpretation of CT of PNS functionally and systemically.

• Radiation Oncology Journal
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• 제10권1호
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• pp.77-83
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• 1992

악성 신경초종의 두경부 영역에서의 발생은 극히 드물다. 대부분의 종양은 급속도로 커져가는 무통성 종물로서 발견되며, 그 증상은 대개 종물의 국소적 팽윤에 기인한다. 약 반수의 경우에서 본 레클링하우젠씨 병과 동반된다. 광범위한 외과적 절제술이 일반적으로 권장되는 일차 치료법이며, 최근 수술후 방사선치료를 이에 포함시키고 있다. 두경부 영역에서 발생한 악성 신경초종의 예후는 특히 나쁜 것으로 보고되어 왔으나, 최근에는 수술후 방사선 치료를 포함한 적절한 치료를 시행함으로써 생존율의 증가가 가능하게 되었다. 저자들은 사골동과 후두 등 희귀한 위치에 발생한 악성 신경초종 2례를 문헌 고찰과 함께 보고 하는 바이다.

• 대한두개안면성형외과학회지
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• 제15권3호
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• pp.125-128
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• 2014

Malignant peripheral nerve sheath tumors are extremely rare soft tissue sarcomas. Among various locations, the trunk and extremities are the most commonly involved sites, with only 15% of such lesions occuring in head and neck region. Here, we report a case of a 74-year-old male who presented with forehead swelling and right eye deviation. Computed tomography images revealed a tumor involving the frontal sinus, ethmoid sinus, and the orbital cavity. The patient underwent a surgical excision of the lesion, which histopathological examination revealed to be a malignant peripheral nerve sheath tumor.

• 대한두경부종양학회지
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• 제8권1호
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• pp.44-49
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• 1992

Malignant schwannoma is a rare tumor arising from the schwann sheath of the nerve fibers. It spreads early to reginal node and metastasis to the lung. Radical surgery have performed for treatment of choice but combined modalities such as radiotherapy or adjuvant chemotherapy have been recommanded recently. The authors experienced two cases of malignant schwannoma originating from the ethmoid sinus and ventricular fold of larynx. and we report these cases briefly.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1983년도 제17차 학술대회연제순서 및 초록
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• pp.17.3-17
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• 1983

부비동내의 이물은 흔히 경험할 수 없는 것으로 그 발생원인은 총기 및 폭발물 사고, 교통 사고 등 외상성 사고로 인한 것과, 부비동 수술시 의료기구의 잔존에 의한 의인성 사고로 나눌 수 있다. 외상성 사고로 인한 부비동내 이물의 발생을 보면 상악동이 가장 흔한 것으로 되어 있고, 전두동, 사골동, 접형동 순으로 되어 있다. 최근 저자 등은 약 8년간의 비폐쇄증 및 농성비루를 주소로 내원하였던 환자에서 좌측 사골동내에 30여 년 이상 체류되었던 1 $\times$ 0.5cm 정도의 탄알파편을 경험하였기에 문헌적 고찰과 함께 보고하는 바이다.

• Imaging Science in Dentistry
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• 제39권4호
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• pp.191-194
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• 2009

Purpose : The purpose of this study was to determine the prevalence of sinus opacification among adult dental patients. Materials and Methods : Five hundred and sixty-four Cone Beam Computed Tomography (CBCT) scans of dental patients over the age of 18 were reviewed for sinus opacification. Opacification was graded as clear, mild, moderate or severe. Patients with any sinus-related signs or symptoms were excluded. Results : Sinus opacification in one or more sinuses was found in 59.2% of the patients. The sinus opacification was mild in 49.8%, moderate in 8.3%, and severe in 1.1%. The maxillary (37.7%) and ethmoid (37.4%) sinuses were most frequently affected. The prevalence was higher in the older age group and showed a male predomination (p<0.05). Conclusion : Sinus opacification in asymptomatic adults is very common and emphasizes the importance of clinical correlation before deciding on the final diagnosis and treatment.