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조일권,정영준,정상환,김영훈 대한이비인후과학회 2010 대한이비인후과학회지 두경부외과학 Vol.53 No.11
Malignant carcinoma involving the sinonasal cavity is a rare tumor that is usually diagnosed as squamous cell carcinoma. Mucoepidermoid carcinoma is relative common, originating from the salivary glands of the oral cavity, pharynx and lacrimal glands. But mucoepidermoid carcinoma of nasal cavity, paranasal sinuses and respiratory tract is very rare. In particular, 38 cases of mucoepidermoid carcinoma occurring in the primary sinonasal tract were reported in the English literature, but only one case of mucoepidermoid carcinoma arising from the nasal cavity has been previous reported to date in the Korean literature. Recently, we experienced a 51-year-old man presenting with progressive nasal obstruction and recurrent epistaxis. He was diagnosed as mucoepidermoid carcinoma extending into the inferior turbinate in the nasal cavity and it was excised with nasal endoscope. We present the clinical characteristics and therapeutic methods of this case with a review of the literature. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:712-5
조일권,정재윤,이정구,서명환 대한평형의학회 2009 Research in Vestibular Science Vol.8 No.2
Sudden sensorineural Hearing Loss with Vertigo (SHLV) is characteristic of sudden onset vertigo and unilateral hearing loss, due to acute and profound deterioration in a vestibular and cochlear system. It is relatively easy to determine the lesion side in SHLV, because the patient will complain of unilateral hearing loss. But, it might not beapplicable to vestibular neuritis case, and several vestibular function tests may be helpful in deciding the lesion side. We have recently encountered a patient with SHLV whose caloric and SHA did not match with the lesion side. We speculated that the uncompensated dynamic defect and imbalance of the cerebellar clamping has been implicated in this lab finding. Although the exact mechanism of this curious finding cannot be explained by this single case report, we should consider that one could make a mistake to determine the involved site just only by lab finding in vestibular neuritis. Sudden sensorineural Hearing Loss with Vertigo (SHLV) is characteristic of sudden onset vertigo and unilateral hearing loss, due to acute and profound deterioration in a vestibular and cochlear system. It is relatively easy to determine the lesion side in SHLV, because the patient will complain of unilateral hearing loss. But, it might not beapplicable to vestibular neuritis case, and several vestibular function tests may be helpful in deciding the lesion side. We have recently encountered a patient with SHLV whose caloric and SHA did not match with the lesion side. We speculated that the uncompensated dynamic defect and imbalance of the cerebellar clamping has been implicated in this lab finding. Although the exact mechanism of this curious finding cannot be explained by this single case report, we should consider that one could make a mistake to determine the involved site just only by lab finding in vestibular neuritis.
이종 무선네트워크에서 가상인터페이스기반 수직적 핸드오버 실증 성능 평가
조일권,윤동근,하상용,최성곤,Cho, Il-Kwon,Yun, Dong-Geun,Ha, Sang-Yong,Choi, Seong-Gon 한국정보처리학회 2012 정보처리학회논문지 C : 정보통신,정보보안 Vol.19 No.2
In this paper, we propose a mobility management scheme which has a simple IP emulation method based on virtual interface. This scheme supports prevention of service abortion resulting from RAT (Radio Access Technology) interface switching during vertical handover and provides mobility management convenience according to maintenance of consistency in simple IP mobility management scheme of 3rd generation mobile network. Through the empirical experiments of proposed method, we check out the improvement of handover performance of the proposed scheme based on vertical handover latency comparing with a non-virtual interface system. 본 논문에서는 이종 무선네트워크간의 수직적 핸드오버를 할 때 네트워크 접속 물리 인터페이스의 전환에 따른 서비스 단절을 방지하고 3세대 무선네트워크 이동성 관리와 일관성을 유지하여 이동성 관리의 편의를 제공할 수 있는 가상 인터페이스 기반의 Simple IP 에뮬레이션 방법을 제안한다. 제안된 방법의 실증적 실험을 통해 가상 인터페이스의 미적용시와 핸드오버 시간을 비교하여 핸드오버 성능 개선을 확인하였다.
양측성으로 인접하지 않은 부비동들에 발생한 다발성 진균구
조일권,정영준 대한이비인후과학회 2009 대한이비인후과학회지 두경부외과학 Vol.52 No.5
Fungus balls of the paranasal sinuses are usually found in only one sinus, most frequently in the maxillary sinus. Multisinus involvement was found only in 6.4% of the largest review of this disease entity. Though fungus ball could be involved in multiple sinuses, these sinuses were mostly contiguous. In addition, bilateral involvement is rare in the literature:only one case of triple discrete fungus balls in a patient has been reported. We recently experienced a rare case of multifocal discrete fungus ball involving the bilateral maxillary sinus and left sphenoid sinus in a 58 year-old female. Therefore, we present this rare case with a brief review of this disease entity.
Clinical Comparison Between Ocular and Cervical Vestibular Evoked Myogenic Potentials
조일권,서명환,문태현,이정구,정재윤 대한평형의학회 2011 Research in Vestibular Science Vol.10 No.2
Background and Objectives: The goal of this study was to compare the outcome between cervical vestibular-evoked myogenic potential (cVEMP) and ocular VEMP (oVEMP) in the patients with definite vestibular dysfunction. Also, the subjective discomfort level was compared between cVEMP, classic oVEMP and head positioned oVEMP (a new method designed by the authors). Materials and Methods: Eighteen patients with dizziness associated with unilateral vestibular hypofunction were included in this study. Vestibular neuritis, Ramsay-hunt syndrome and sudden sensorineural hearing loss with vertigo were included in unilateral vestibular hypofunction disease. cVEMP, classic oVEMP, and head positioned oVEMP were assessed and compared. To compare the subjective discomfort during the tests,visual analogue scale on discomfort was checked. Results: There was a discrepancy between the cVEMP and classic oVEMP in 31.3% of the cases. The classic oVEMP were associated with more discomfort than the cVEMP. But, there was no difference between the classic and head positioned oVEMP. Conclusion: Since a substantial discrepancy was identified between the cVEMP and oVEMP, the pathways involved in cVEMP and oVEMP are likely different even with the same air conduction tone stimuli. The head positioned oVEMP may be an alternative to the classic oVEMP which has similar results and subjective discomfort levels.
면역 저하 환자에서 세균과 진균 감염에 의해 발현된 비중격 농양
조일권,정영준 대한이비인후과학회 2012 대한이비인후과학회지 두경부외과학 Vol.55 No.6
Nasal septal abscess (NSA) occurs more commonly after minor trauma and subsequent bacterial infection. However, it rarely occurs without trauma and can be associated with poor immunity. In the immunocompromised patient, NSA can occur due to fungal as well as bacterial infection; cases caused by fungal infection have been rarely reported. We experienced a case of NSA caused by combined fungal and bacterial infection without trauma in a patient with poorly-controlled diabetes mellitus. He underwent incision and drainage. Organism cultured from NSA was Staphylococcus epidermidis. Pathologic examination identified granulomatous inflammation in the septal cartilage and septate, branching fungal hyphae that had invaded the cartilage. He was treated by adequate blood glucose control and antibiotics coverage without antifungal medications. His symptom was improved despite the antifungal agent was not used. Therefore, we present this case with a brief review of the disease entity and discuss the necessity of antifungal treatment in this case.