1.Long-Term Clinical Course of Benign Fibro-Osseous Lesions in the Paranasal Sinuses
Jung Joo LEE ; Gwanghui RYU ; Kyung Eun LEE ; Sang Duk HONG ; Yong Gi JUNG ; Hyo Yeol KIM ; Hun-Jong DHONG ; Seung-Kyu CHUNG
Clinical and Experimental Otorhinolaryngology 2021;14(4):374-381
		                        		
		                        			 Objectives:
		                        			. Fibro-osseous lesions of the paranasal sinuses can present various clinical manifestations. This study aimed to report the long-term clinical course of benign fibro-osseous lesions (BFOLs) in the paranasal sinuses, including clinical and radiologic features. 
		                        		
		                        			Methods:
		                        			. Radiologically confirmed BFOLs between 1994 and 2016, with the exclusion of osteoma cases, were retrospectively reviewed. We compared demographic characteristics between the surgery and observation groups. The reasons for the imaging study, radiographic features, histopathology, and clinical course based on serial image scans were analyzed. 
		                        		
		                        			Results:
		                        			. In total, 183 subjects were selected from a thorough review of head and neck radiologic tests (n=606,068) at a tertiary referral hospital over 22 years. Patients’ mean age was 28.6±18.1 years, and 56.3% were males. A diagnostic imaging workup was performed in 55.7% of patients due to facial asymmetry, headache, skull mass, or other symptoms related to BFOLs. In other patients (37.7%), BFOLs were found incidentally on computed tomography or magnetic resonance imaging. The most common diagnosis was fibrous dysplasia, followed by ossifying fibroma, based on both radiologic exams and histopathologic results. In total, 42.6% of the patients underwent surgery because of subjective symptoms or esthetic concerns. The patients who underwent surgery were younger (P<0.001) and had a longer follow-up duration (P<0.001) than those who underwent observation. Patients who experienced lesion growth (11.5%) were younger (P<0.001) and had more lesion sites (P=0.018) than those who did not, regardless of surgical treatment. Five patients underwent optic nerve decompression, and one patient experienced malignant transformation. 
		                        		
		                        			Conclusion
		                        			. BFOL in the paranasal sinuses is a rare disease, and most cases were observed without specific treatment. Surgical treatment should be considered in symptomatic patients with aggressive clinical features. Regular observation and management are needed, particularly in younger patients in their teens.  
		                        		
		                        		
		                        		
		                        	
2.The Effect of Triamcinolone-Soaked Gelfoam in Patients with Polypoid Mucosal Change after Endoscopic Sinus Surgery
Gwanghui RYU ; Young Sang CHO ; Sang Duk HONG ; Hyo Yeol KIM ; Seung-Kyu CHUNG ; Hun-Jong DHONG
Journal of Rhinology 2020;27(1):16-20
		                        		
		                        			 Background and Objectives:
		                        			Chronic rhinosinusitis with nasal polyps (CRSwNP) recurs frequently after endoscopic sinus surgery (ESS). The aim of study was to evaluate the efficacy of triamcinolone-soaked absorbable gelatin foam (gelfoam) as a treatment for recurred polypoid changes after ESS.Subjects and Method: A total of 35 patients and 57 nasal cavities was retrospectively reviewed. All patients underwent triamcinolone- infused gelfoam packing for 1 week under nasal endoscopic guidance. Endoscopic scores were evaluated at 1 week, 1 month, and 3 months. We analyzed clinical characteristics between success and failure groups. 
		                        		
		                        			Results:
		                        			Endoscopic scores were significantly improved after triamcinolone-soaked gelfoam packing, and the effects were maintained at 3-month follow-up (1.85±0.61 vs. 0.82±0.77, p<0.001). Duration between surgery and gelfoam packing was shorter in the success group compared to the failure group (8.2±6.9 vs. 13.7±8.4 weeks, p=0.033). Serum eosinophil cationic protein and tissue eosinophil counts were significantly higher in the failure group (p=0.025 and p=0.010, respectively). 
		                        		
		                        			Conclusion
		                        			Triamcinolone-soaked gelfoam packing is an effective and safe method for managing recurrent polypoid change in patients with CRSwNP after ESS. Early intervention contributed to a successful result, and eosinophilic inflammation was associated with poor outcomes. 
		                        		
		                        		
		                        		
		                        	
3.Immunological Characteristics in Refractory Chronic Rhinosinusitis with Nasal Polyps Undergoing Revision Surgeries
Gwanghui RYU ; Dong Kyu KIM ; Hun Jong DHONG ; Kyoung Mi EUN ; Kyung Eun LEE ; Il Gyu KONG ; HyoYeol KIM ; Seung Kyu CHUNG ; Dong Young KIM ; Chae Seo RHEE ; Seong Ho CHO ; Sang Duk HONG ; Dae Woo KIM
Allergy, Asthma & Immunology Research 2019;11(5):664-676
		                        		
		                        			
		                        			PURPOSE: Despite medical and surgical treatments, some cases of nasal polyps (NP) exhibit recidivism. However, the endotype of refractory chronic rhinosinusitis with NP (CRSwNP) remains unclear. Therefore, the objective of this study was to characterize the immunological profile of refractory CRSwNP. METHODS: The control (n =23), primary NP group (pNP, n =70) and refractory NP group (rNP, n =86) were enrolled in this study. Patients who underwent revision surgeries due to failed maximal medical treatment after primary surgery were defined as the rNP group. A total of 18 inflammatory markers were investigated in nasal tissues using multiplex cytokine assay or enzyme-linked immunosorbent assay. RESULTS: The clinical characteristics of rNP included more extensive disease and worse clinical course after surgery. Additionally, rNP subjects showed higher infection rate (mucopurulence and culture-positive rate), more frequent use of antibiotics and suffered from symptomatic bacterial infection, increased asthma morbidity compared to pNP. Cytokine profile analysis showed that levels of Th17-associated mediators (myeloperoxidase, interleukin (IL)-8, IL-17A and IL-23), B-cell activating factor (BAFF) and Th1 cytokine (interferon-γ) were up-regulated in rNP compared to controls and pNP. Human neutrophil elastase-positive cells were also enhanced in rNP compared with pNP. Upregulation of Th17/Th1mediators and BAFF were observed in rNP, regardless of tissue eosinophilia or asthmatic comorbidity. Interestingly, eosinophilic markers, such as eosinophil cationic protein and C-C motif chemokine ligand 24, were up-regulated in asthmatic rNP compared to pNP and controls. Levels of anti-dsDNA immunoglobulin (Ig) G and IgA were up-regulated in rNP and highest in asthmatic eosinophilic rNP among subtypes of rNP. CONCLUSIONS: Our results suggest that Th17/Th1-associated mediators and BAFF may play a role and be a potential therapeutic target in refractory CRSwNP. Additionally, eosinophilic markers and autoantibodies may contribute to refractoriness in asthmatic rNP.
		                        		
		                        		
		                        		
		                        			Anti-Bacterial Agents
		                        			;
		                        		
		                        			Asthma
		                        			;
		                        		
		                        			Autoantibodies
		                        			;
		                        		
		                        			B-Cell Activating Factor
		                        			;
		                        		
		                        			Bacterial Infections
		                        			;
		                        		
		                        			Comorbidity
		                        			;
		                        		
		                        			Enzyme-Linked Immunosorbent Assay
		                        			;
		                        		
		                        			Eosinophil Cationic Protein
		                        			;
		                        		
		                        			Eosinophilia
		                        			;
		                        		
		                        			Eosinophils
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Immunoglobulin A
		                        			;
		                        		
		                        			Immunoglobulins
		                        			;
		                        		
		                        			Interleukin-17
		                        			;
		                        		
		                        			Interleukins
		                        			;
		                        		
		                        			Nasal Polyps
		                        			;
		                        		
		                        			Neutrophils
		                        			;
		                        		
		                        			Sinusitis
		                        			;
		                        		
		                        			Th17 Cells
		                        			;
		                        		
		                        			Up-Regulation
		                        			
		                        		
		                        	
4.Comparison Between Endoscopic Prelacrimal Medial Maxillectomy and Caldwell-Luc Approach for Benign Maxillary Sinus Tumors
Jung Joo LEE ; Al Magribi AHMAD Z ; Donghyeok KIM ; Gwanghui RYU ; Hyo Yeol KIM ; Hun Jong DHONG ; Seung Kyu CHUNG ; Sang Duk HONG
Clinical and Experimental Otorhinolaryngology 2019;12(3):287-293
		                        		
		                        			
		                        			OBJECTIVES: Endoscopic prelacrimal medial maxillectomy (EPMM) was previously reported to treat maxillary inverted papilloma. This study aimed to compare prelacrimal recess approach with the conventional Caldwell-Luc approach (CLA) to remove benign maxillary sinus tumors and to evaluate the usefulness of this approach based on our experience. METHODS: Ten patients who underwent EPMM at our hospital from January 2013 to December 2017 were reviewed. We also reviewed 30 patients who underwent benign maxillary sinus tumor resection via CLA during the same period. From medical records, postoperative pathological results, complications due to surgery, and recurrence rate were evaluated. RESULTS: There were eight inverted papilloma, one ameloblastoma, and one ossifying fibroma in the EPMM group. In the CLA group, all 30 cases were inverted papilloma. There were no cases of failure at gross total removal during surgery, and no recurrences were observed during follow-up in either groups. Mean follow-up period was 13.0 months in CLA group and 10.8 months in EPMM group. Regarding postoperative complications, 11 patients of the CLA group (37%) and three patients of the EPMM group (30%) had numbness around the cheek and upper lip area after surgery (P=0.715). In the CLA group, there were eight patients who had numbness lasting more than 3 months after surgery, and two patients had numbness for more than 1 year. However, facial numbness disappeared within 3 months in all patients in the EPMM group, in which epiphora was not observed. CONCLUSION: EPMM is the effective surgical approach for resecting benign maxillary sinus tumor compared with CLA. Although facial numbness was reported in EPMM, the duration of numbness was shorter than CLA.
		                        		
		                        		
		                        		
		                        			Ameloblastoma
		                        			;
		                        		
		                        			Cheek
		                        			;
		                        		
		                        			Endoscopy
		                        			;
		                        		
		                        			Fibroma, Ossifying
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Hypesthesia
		                        			;
		                        		
		                        			Lacrimal Apparatus Diseases
		                        			;
		                        		
		                        			Lip
		                        			;
		                        		
		                        			Maxillary Sinus Neoplasms
		                        			;
		                        		
		                        			Maxillary Sinus
		                        			;
		                        		
		                        			Medical Records
		                        			;
		                        		
		                        			Papilloma, Inverted
		                        			;
		                        		
		                        			Postoperative Complications
		                        			;
		                        		
		                        			Recurrence
		                        			
		                        		
		                        	
5.A Case of Symptomatic Maxillary Retention Cyst.
Hankyeol KIM ; Eun Kyu LEE ; Hyo Yeol KIM ; Sang Duck HONG ; Hun Jong DHONG ; Seung Kyu CHUNG
Journal of Rhinology 2018;25(1):59-62
		                        		
		                        			
		                        			Retention cyst of the maxillary sinus is a benign lesion produced from obstruction of a seromucous gland or duct. It is mostly asymptomatic but sometimes is accompanied by facial pain, headache, nasal obstruction, and other symptoms. However, there are some debates on whether the symptoms are directly related with retention cyst. These cysts typically do not require treatment. However, when accompanied by symptoms, treatment can be administered for diagnostic and therapeutic purposes. We report a case in which facial pain is caused by a maxillary retention cyst suspended from an infraorbital nerve.
		                        		
		                        		
		                        		
		                        			Facial Pain
		                        			;
		                        		
		                        			Headache
		                        			;
		                        		
		                        			Maxillary Sinus
		                        			;
		                        		
		                        			Nasal Obstruction
		                        			;
		                        		
		                        			Paranasal Sinus Neoplasms
		                        			
		                        		
		                        	
6.Efficacy of Endoscopic Electrocauterization for Recurrent Posterior Epistaxis.
Jung Joo LEE ; Eunkyu LEE ; Gwanghui RYU ; Min Young SEO ; Sang Duk HONG ; Hyo Yeol KIM ; Hun Jong DHONG ; Seung Kyu CHUNG
Journal of Rhinology 2018;25(2):75-79
		                        		
		                        			
		                        			BACKGROUND AND OBJECTIVES: To investigate the common site of recurrent epistaxis after initial intervention such as packing and cauterization had failed and to evaluate the efficacy of surgical endoscopic electrocautery. SUBJECTS AND METHOD: Retrospective review of 47 patients with recurrent and uncontrolled idiopathic epistaxis between October 1995 and March 2016. All patients underwent endoscopic examination in the operating room after hospitalization. We performed electrocautery when a bleeding site was found. RESULTS: The most common sites of bleeding were the inferior meatus (28%), sphenoethmoid recess (23%), superior septum around the olfactory cleft (13%), and the posterior end of the middle turbinate (15%). There was no serious complication during the one week after surgery. In 46 (98%) patients, refractory epistaxis was successfully controlled. One patient had recurrent epistaxis after electrocautery and underwent endoscopic sphenopalatine artery ligation. CONCLUSION: In patients with refractory idiopathic epistaxis after failure of first-line treatment, endoscopic examination through a surgical approach and electrocautery for suspected bleeding are effective.
		                        		
		                        		
		                        		
		                        			Arteries
		                        			;
		                        		
		                        			Cautery
		                        			;
		                        		
		                        			Electrocoagulation
		                        			;
		                        		
		                        			Epistaxis*
		                        			;
		                        		
		                        			Hemorrhage
		                        			;
		                        		
		                        			Hospitalization
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Ligation
		                        			;
		                        		
		                        			Methods
		                        			;
		                        		
		                        			Operating Rooms
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Turbinates
		                        			
		                        		
		                        	
7.Triangular Resection of the Upper Lateral Cartilage for Middle Vault Deviation.
Gwanghui RYU ; Min Young SEO ; Kyung Eun LEE ; Sang Duk HONG ; Seung Kyu CHUNG ; Hun Jong DHONG ; Hyo Yeol KIM
Clinical and Experimental Otorhinolaryngology 2018;11(4):275-280
		                        		
		                        			
		                        			OBJECTIVES: Middle vault deviation has a significant effect on the aesthetic and functional aspects of the nose, and its management continues to be a challenge. Spreader graft and its modification techniques have been focused, but there has been scarce consideration for removing surplus portion and balancing the upper lateral cartilage (ULC). This study aimed to report the newly invented triangular-shaped resection technique (“triangular resection”) of the ULC and to evaluate its efficacy for correcting middle vault deviation. METHODS: A retrospective study included 17 consecutive patients who presented with middle vault deviation and underwent septorhinoplasty by using triangular resection at a tertiary academic hospital from February 2014 and March 2016. Their outcomes were evaluated pre- and postoperatively including medical photographs, acoustic rhinometry and subjective nasal obstruction using a 7-point Likert scale. RESULTS: The immediate outcomes were evaluated around 1 month after surgery, and long-term outcomes were available in 12 patients; the mean follow-up period was 9.1 months. Nasal tip deviation angle was reduced from 5.66° to 2.37° immediately (P < 0.001). Middle vault deviation also improved from 169.50° to 177.24° (P < 0.001). Long-term results were 2.49° (P=0.015) for nasal tip deviation and 178.68° (P=0.002) for middle vault deviation. The aesthetic outcome involved a complete correction in eight patients (47.1%), a minimally visible deviation in seven patients (41.2%) and a remaining residual deviation in two patients (11.8%). Pre- and postoperative minimal cross-sectional areas (summation of the right and left sides) were 0.86 and 1.07, respectively (P=0.021). Fifteen patients answered about their nasal obstruction symptoms and the median symptom score had alleviated from 6.0 to 3.0 (P=0.004). CONCLUSION: Triangular resection of the ULC is a simple and effective method for correcting middle vault deviation and balancing the ULCs without complications as internal nasal valve narrowing.
		                        		
		                        		
		                        		
		                        			Cartilage*
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Methods
		                        			;
		                        		
		                        			Nasal Cartilages
		                        			;
		                        		
		                        			Nasal Obstruction
		                        			;
		                        		
		                        			Nose
		                        			;
		                        		
		                        			Nose Deformities, Acquired
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Rhinometry, Acoustic
		                        			;
		                        		
		                        			Rhinoplasty
		                        			;
		                        		
		                        			Transplants
		                        			
		                        		
		                        	
8.Changes in the Reflux Symptom Index After Multilevel Surgery for Obstructive Sleep Apnea.
Su Jin KIM ; Hyo Yeol KIM ; Jong In JEONG ; Sang Duk HONG ; Seung Kyu CHUNG ; Hun Jong DHONG
Clinical and Experimental Otorhinolaryngology 2017;10(3):259-264
		                        		
		                        			
		                        			OBJECTIVES: This study evaluated whether the symptoms of laryngopharyngeal reflux (LPR) change after multilevel surgery for obstructive sleep apnea (OSA). METHODS: Patients who underwent multilevel surgery for OSA between April 2009 and September 2014 were enrolled in this study. All patients underwent preoperative polysomnography prior to surgery and were asked to complete the reflux symptom index (RSI) questionnaire before and after surgery. RESULTS: Of 73 enrolled patients, 24 (33%) reported an RSI score >13 and were thus classified as having reflux. The mean RSI score before surgery was 11.48±7.95; this number decreased to 4.95±6.19 after surgery (P < 0.001). The rate of positive RSI responses was 33% before surgery and 9% after surgery. Each variable that comprised the RSI improved significantly after surgery, except for difficulty with swallowing. Regarding the degree of RSI improvement after surgery, there were no significant differences between subgroups according to sex, age, body mass index, OSA severity, or surgical outcome. CONCLUSION: LPR symptoms are prevalent in OSA patients. Treatment for OSA using multilevel surgery potentially reduces the symptoms of LPR.
		                        		
		                        		
		                        		
		                        			Body Mass Index
		                        			;
		                        		
		                        			Deglutition
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Laryngopharyngeal Reflux
		                        			;
		                        		
		                        			Polysomnography
		                        			;
		                        		
		                        			Sleep Apnea, Obstructive*
		                        			
		                        		
		                        	
9.External Snapping Hip Treated by Effective Designed N-plasty of the Iliotibial Band.
Jong Seok PARK ; Woo Jong KIM ; Dhong Won LEE ; Jae Wan SOH ; Sung Hun WON ; Sang Woo LEE ; Sang Il MOON ; Hyoung Ye KIM
Hip & Pelvis 2017;29(3):187-193
		                        		
		                        			
		                        			PURPOSE: The purpose of this study is to present the effective design of N-plasty of the iliotibial band and surgical results of its use as a treatment for refractory external snapping hip. MATERIALS AND METHODS: We evaluated 17 patients (24 cases) with external snapping hip who underwent N-plasty between October 2013 and May 2016 and who were followed up for at least 12 months. All patients were male and the mean age was 20.8 years. The mean duration of symptoms prior to surgical intervention was 28.5 months with an average follow up of 24.5 months. Surgery was defined as being successful when patients could carry out their daily activities and exercise without a clicking sensation or pain 6 months after surgery until their last follow-up. Failure was defined when either a clicking sensation or pain was present. The visual analog scale (VAS) and modified Harris hip score (mHHS) were measured and compared preoperatively and at last follow-up. RESULTS: All patients had complete resolution of pain and snapping. The VAS decreased from 6.77 preoperatively to 0.09 postoperatively and mHHS improved from 69.5 to 97.8 after surgery. CONCLUSION: Modified designed N-plasty is considered to be an excellent treatment method facilitating operation reproducibility with maximum elongation effect of the iliotibial band.
		                        		
		                        		
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Hip*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Methods
		                        			;
		                        		
		                        			Sensation
		                        			;
		                        		
		                        			Visual Analog Scale
		                        			
		                        		
		                        	
10.External Snapping Hip Treated by Effective Designed N-plasty of the Iliotibial Band.
Jong Seok PARK ; Woo Jong KIM ; Dhong Won LEE ; Jae Wan SOH ; Sung Hun WON ; Sang Woo LEE ; Sang Il MOON ; Hyoung Ye KIM
Hip & Pelvis 2017;29(3):187-193
		                        		
		                        			
		                        			PURPOSE: The purpose of this study is to present the effective design of N-plasty of the iliotibial band and surgical results of its use as a treatment for refractory external snapping hip. MATERIALS AND METHODS: We evaluated 17 patients (24 cases) with external snapping hip who underwent N-plasty between October 2013 and May 2016 and who were followed up for at least 12 months. All patients were male and the mean age was 20.8 years. The mean duration of symptoms prior to surgical intervention was 28.5 months with an average follow up of 24.5 months. Surgery was defined as being successful when patients could carry out their daily activities and exercise without a clicking sensation or pain 6 months after surgery until their last follow-up. Failure was defined when either a clicking sensation or pain was present. The visual analog scale (VAS) and modified Harris hip score (mHHS) were measured and compared preoperatively and at last follow-up. RESULTS: All patients had complete resolution of pain and snapping. The VAS decreased from 6.77 preoperatively to 0.09 postoperatively and mHHS improved from 69.5 to 97.8 after surgery. CONCLUSION: Modified designed N-plasty is considered to be an excellent treatment method facilitating operation reproducibility with maximum elongation effect of the iliotibial band.
		                        		
		                        		
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Hip*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Methods
		                        			;
		                        		
		                        			Sensation
		                        			;
		                        		
		                        			Visual Analog Scale
		                        			
		                        		
		                        	
            
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