1.Penile Squamous Cell Carcinoma Diagnosed following Treatment of Urethrocutaneous Fistula after CO2 Laser Therapy for Misdiagnosed Penile Lesion: Report of a Case.
Young Joo KIM ; Sung Dae KIM ; Hyeon Ju KIM ; Young Hee MAENG ; Jung Sik HUH
Korean Journal of Andrology 2011;29(1):88-90
		                        		
		                        			
		                        			The complications of the treatment of penile lesion are wide ranging, urethrocutaneous fistula being one of the less common. This complication affects the ventral aspect of the penis. We present a rare case of urethrocutaneous fistula after vaporization of penile lesion by CO2 Laser. One fistula was at ventral aspect of the penis. A 43-year-old male presented with passage of urine from one opening. He had undergone a vaporization by CO2 laser, 2 times. Urethrocutaneous fistula repairs was performed with biopsy of the edge of fistula site. Squamous cell carcinoma was confirmed. He subsequently underwent a partial penectomy. It is very important that biopsy was performed before vaporization of even small size skin lesion. This case is reported along with a brief review of the literature.
		                        		
		                        		
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Biopsy
		                        			;
		                        		
		                        			Carcinoma, Squamous Cell
		                        			;
		                        		
		                        			Cutaneous Fistula
		                        			;
		                        		
		                        			Fistula
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Lasers, Gas
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Penile Diseases
		                        			;
		                        		
		                        			Penis
		                        			;
		                        		
		                        			Skin
		                        			;
		                        		
		                        			Volatilization
		                        			
		                        		
		                        	
2.The Ligamentotactic Effect on a Herniated Disc at the Level Adjacent to the Anterior Lumbar Interbody Fusion : Report of Two Cases.
Jun Hong MIN ; Jee Soo JANG ; Seok Kang KIM ; Dae Hyeon MAENG ; Sang Ho LEE
Journal of Korean Neurosurgical Society 2009;46(1):65-67
		                        		
		                        			
		                        			The authors report two cases of spontaneous regression of disc herniation at the level adjacent to the anterior lumbar interbody fusion (ALIF) level. This phenomenon may be due to the increased tension on the posterior longitudinal ligament (PLL) by appropriate restoration of the disc height and lumbar lordosis, which is a mechanism similar to ligamentotaxis applied to the thoracolumbar burst fracture.
		                        		
		                        		
		                        		
		                        			Animals
		                        			;
		                        		
		                        			Intervertebral Disc Displacement
		                        			;
		                        		
		                        			Longitudinal Ligaments
		                        			;
		                        		
		                        			Lordosis
		                        			
		                        		
		                        	
3.A Morphometric Analysis of Neuroforamen in Grade I Isthmic Spondylolisthesis by Anterior Lumbar Interbody Fusion with Pedicle Screw Fixation.
Dong Yeob LEE ; Sang Ho LEE ; Seok Kang KIM ; Dae Hyeon MAENG ; Jee Soo JANG
Journal of Korean Neurosurgical Society 2007;41(6):377-381
		                        		
		                        			
		                        			OBJECTIVES: The aim of this study was to evaluate the morphometric changes in neuroforamen in grade I isthmic spondylolisthesis by anterior lumbar interbody fusion (ALIF). METHODS: Fourteen patients with grade I isthmic spondylolisthesis who underwent single level ALIF with percutaneous pedicle screw fixation were enrolled. All patients underwent standing lateral radiography and magnetic resonance imaging (MRI) before surgery and at 1 week after surgery. For quantitative analysis, the foraminal height, foraminal width, epidural foraminal height, epidural foraminal width, and epidural foraminal area were evaluated at the mid-portion of 28 foramens using T2-weighted sagittal MRI. For qualitative analysis, degree of neural compression in mid-portion of 28 foramens was classified into 4 grades using T2-weighted sagittal MRI. Clinical outcomes were assessed using Visual Analogue Sale (VAS) scores for leg pain and Oswestry disability index before surgery and at 1 year after surgery. RESULTS: The affected levels were L4-5 in 10 cases and L5-S1 in 4. The mean foraminal height was increased (p<0.001), and the mean foraminal width was decreased (p=0.014) significantly after surgery. The mean epidural foraminal height (p<0.001), epidural foraminal width (p<0.001), and epidural foraminal area (p<0.001) showed a significant increase after surgery. The mean grade for neural compression was decreased significantly after surgery (p<0.001). VAS scores for leg pain (p=0.001) and Oswestry disability index (p=0.001) was decreased significantly at one year after surgery. CONCLUSION: Foraminal stenosis in grade I isthmic spondylolisthesis may effectively decompressed by ALIF with percutaneous pedicle screw fixation.
		                        		
		                        		
		                        		
		                        			Commerce
		                        			;
		                        		
		                        			Constriction, Pathologic
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Leg
		                        			;
		                        		
		                        			Magnetic Resonance Imaging
		                        			;
		                        		
		                        			Radiography
		                        			;
		                        		
		                        			Spondylolisthesis*
		                        			
		                        		
		                        	
4.Anterior Lumbar Interbody Fusion with Pedicle Screw Fixation for Elderly Isthmic Spondylolisthesis.
Dong Yeob LEE ; Sang Ho LEE ; Dae Hyeon MAENG ; Jee Soo JANG
Journal of Korean Neurosurgical Society 2006;40(3):175-179
		                        		
		                        			
		                        			OBJECTIVE: The surgical outcome of anterior lumbar interbody fusion(ALIF) with pedicle screw fixation for elderly isthmic spondylolisthesis was analyzed. METHODS: Consecutive nineteen elderly patients (aged 65 years or more) with isthmic spondylolisthesis (Grade I or II) who underwent single level ALIF with pedicle screw fixation in 2002 were analyzed. Using clinical chart and mailed questionnaires, preoperative and postoperative Visual Analogue Scale(VAS) of back and leg pain and postoperative Macnab criteria were evaluated. RESULTS: The mean age at the time of operation was 68.4 years (range 65 to 78 years). Twelve patients underwent ALIF with percutaneous pedicle screw fixation. Seven patients underwent ALIF followed by posterior decompression and pedicle screw fixation. The postoperative complication rate was 10.5% (wound dehiscence in 1 patient and incisional hernia in 1 patient). There was no postoperative major morbidity or mortality. At a mean follow-up duration of 30.7 months (range 25 to 35 months), 93.3% (14/15) of the patients showed excellent or good outcomes in terms of Macnab criteria. The mean VAS scores of back pain and leg pain significantly decreased after surgery. CONCLUSION: ALIF with pedicle screw fixation yielded favorable results for elderly isthmic spondylolisthesis in selected cases.
		                        		
		                        		
		                        		
		                        			Aged*
		                        			;
		                        		
		                        			Back Pain
		                        			;
		                        		
		                        			Decompression
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Hernia
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Leg
		                        			;
		                        		
		                        			Mortality
		                        			;
		                        		
		                        			Postal Service
		                        			;
		                        		
		                        			Postoperative Complications
		                        			;
		                        		
		                        			Surveys and Questionnaires
		                        			;
		                        		
		                        			Spondylolisthesis*
		                        			
		                        		
		                        	
5.Lumbar Corpectomy by Using Anterior Midline Route.
Dae Hyeon MAENG ; Seokmin CHOI ; Sang ho LEE
Journal of Korean Neurosurgical Society 2005;38(5):399-402
		                        		
		                        			
		                        			Direct anterior approach for lesions located anterior to the thecal sac is definitely superior to lateral or posterior approach in many respects. However, various anatomical obstacles and technical difficulties often hinder direct anterior approach. Thanks to ripe experience of retroperitoneal approach to the lumbar spine for anterior lumbar interbody fusion and total disc replacement, the authors could perform lumbar corpectomy and reconstruction by using midline retroperitoneal approach recently. During this approach, we repaired anterior longitudinal ligament also to reduce the risk of graft extrusion and to prevent erosion of vascular wall due to direct contact between metallic hardware, which was used for reconstruction of vertebral body, and major vessels.
		                        		
		                        		
		                        		
		                        			Longitudinal Ligaments
		                        			;
		                        		
		                        			Spine
		                        			;
		                        		
		                        			Total Disc Replacement
		                        			;
		                        		
		                        			Transplants
		                        			
		                        		
		                        	
6.Isthmic Spondylolisthesis Associated with Foraminal Disc Herniation Treated by Anterior Lumbar Interbody Fusion.
Dong Yeob LEE ; Sang Ho LEE ; Dae Hyeon MAENG ; Jee Soo JANG
Journal of Korean Neurosurgical Society 2005;38(4):320-322
		                        		
		                        			
		                        			A 45-year-old man presented with lower back pain and pain in the right leg of 3years duration. A plain radiographic examination revealed grade I isthmic spondylolisthesis, with instability at L4-5. Computed tomography and magnetic resonance imaging demonstrated bilateral foraminal stenosis, with soft foraminal disc herniation on the right side at the L4-5 level. He underwent anterior lumbar interbody fusion(ALIF) with percutaneous posterior fixation(PF) at the L4-5 level. Without removing the posterior bony structures, removal of foraminal disc herniation and reduction of spondylolisthesis were successfully performed using ALIF with percutaneous PF. When there is no hard disc herniation or lateral recess stenosis, ALIF with percutaneous PF can be one of the treatment options for isthmic spondylolisthesis, even in the presence of foraminal disc herniation, as in our case.
		                        		
		                        		
		                        		
		                        			Constriction, Pathologic
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Leg
		                        			;
		                        		
		                        			Low Back Pain
		                        			;
		                        		
		                        			Magnetic Resonance Imaging
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Spondylolisthesis*
		                        			
		                        		
		                        	
7.Surgical Treatment of Tuberculous Cold Abscess of the Chest Wall.
Hyo Chae PAIK ; Kyung Young CHUNG ; Jeong Han KANG ; Dae Hyeon MAENG
Yonsei Medical Journal 2002;43(3):309-314
		                        		
		                        			
		                        			The incidence of tuberculosis (Tbc) infection is high in some parts of the world and tuberculous cold abscess of the chest wall (CACW) often fails to respond to medical treatment. Medical records of 178 patients who underwent surgical treatment of chest wall abscesses from July 1970 to Sept. 2000 were reviewed and 89 patients who were pathologically confirmed as Tbc cold abscess cases were included in this study. Their ages ranged from 9 to 71 years (mean 33.3 years) and the male to female ratio was 1.2:1 (49 male, 40 female). The symptoms were palpable chest wall mass, pain and pus discharge, and three patients had multiple lesions. Twenty-five patients (28%) underwent excision of chest wall abscesses and 64 patients (72%) underwent chest wall and rib resection. Tbc medication was given preoperatively in 39 patients for an average of 6.3 months and all patients were given Tbc medication postoperatively for an average of 12 months. Postoperative complications were bleeding, pus discharge, empyema, pleural effusion, wound dehiscence, subcutaneous emphysema and activation of pulmonary Tbc. The disease recurred in 7 patients (7.8%) and these 7 patients all underwent a second operation. We recommend preoperative Tbc medication and complete resection of chest wall abscesses including any suspicious ribs. Postoperative Tbc medication for a minimum of 12 months is essential to decrease the risk of a relapse.
		                        		
		                        		
		                        		
		                        			Abscess/drug therapy/*surgery
		                        			;
		                        		
		                        			Adolescent
		                        			;
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Antitubercular Agents/therapeutic use
		                        			;
		                        		
		                        			Child
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Human
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Middle Age
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Thoracic Diseases/drug therapy/*surgery
		                        			;
		                        		
		                        			*Thoracic Surgical Procedures
		                        			;
		                        		
		                        			Thoracic Vertebrae/surgery
		                        			;
		                        		
		                        			Tuberculosis/drug therapy/*surgery
		                        			
		                        		
		                        	
8.Surgery for Lung Metastases from Colorectal Cancer.
Hyo Chae PAIK ; Dae Hyeon MAENG ; Suk Suk SONG ; Kil Dong KIM ; Kyung Young CHUNG
Journal of the Korean Society of Coloproctology 2002;18(1):37-41
		                        		
		                        			
		                        			PURPOSE: The liver and lung are the most common site of metastases after curative resection of colorectal carcinoma, and only 10 months of median survival is achieved once metastases has occurred in the lung. About 10% of patients have a solitary pulmonary metastasis and surgical resection leads to a 5 year survival rate of 21~43%. We have tried to define ideal candidates for pulmonary resection in a patient with pulmonary metastases from colorectal carcinoma. METHODS: Between March 1990 to Feb. 2001, 25 patients underwent pulmonary resection for metastatic colorectal carcinoma. 15 patients were male, and 10 were female with mean age of 60.0 (range, 36~73) years. The primary sites were colon in 7 patients and rectum in 18 patients. RESULTS: The mean disease free interval was 30.04 19.79 (range, 1~84) months and 19 patients had single metastasis and 6 patients had multiple metastatic lesions. Twenty- one patients had unilateral lesion. Wedge resection was done in 10 patients, lobectomy in 7, pneumonectomy in 2, wedge resection with bilobectomy in 2, segmentectomy and wedge resection in 1, and segmentectomy and lobectomy in 1 patient. Six patients recurred mean 13.7 months after the first operation (range, 1~33 months) and they underwent wedge resection in 4 and one case each of lobectomy and segmentectomy. Seven patients died during follow up with 3 year survival rate of 70.8% and 5 year survival rate of 43.4%. CONCLUSIONS: The disease free interval, number of metastases, type and location of pulmonary resection, level of carcinoembryonic antigen had no correlation with the survival rate. We conclude that surgical resection of colorectal lung metastases is safe and effective, and every patients should be evaluated as a surgical candidate.
		                        		
		                        		
		                        		
		                        			Carcinoembryonic Antigen
		                        			;
		                        		
		                        			Colon
		                        			;
		                        		
		                        			Colorectal Neoplasms*
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Liver
		                        			;
		                        		
		                        			Lung*
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Mastectomy, Segmental
		                        			;
		                        		
		                        			Neoplasm Metastasis*
		                        			;
		                        		
		                        			Pneumonectomy
		                        			;
		                        		
		                        			Rectum
		                        			;
		                        		
		                        			Survival Rate
		                        			
		                        		
		                        	
9.Cavernous Hemangioma in the Anterior Mediastinum.
Dae Hyeon MAENG ; Young Nam YOUN ; Kyoung Young CHUNG ; Hyo Chae PAIK
The Korean Journal of Thoracic and Cardiovascular Surgery 2002;35(1):82-85
		                        		
		                        			
		                        			Cavernous hemangiomas of the mediastinum are rare tumors. A 3 year and 8 month-old female patient was referred because of an abnormal chest radiograph. Chest X-ray revealed abnormal shadow occupying nearly the entire left thoracic cavity. Surgical excision was performed and pathologic diagnosis was confirmed as 15X10 cm sized cavernous hemangioma. On the eighth postoperative day, the patient was discharged without any complications and has been followed up without any problems.
		                        		
		                        		
		                        		
		                        			Diagnosis
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Hemangioma
		                        			;
		                        		
		                        			Hemangioma, Cavernous*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Infant
		                        			;
		                        		
		                        			Mediastinum*
		                        			;
		                        		
		                        			Radiography, Thoracic
		                        			;
		                        		
		                        			Thoracic Cavity
		                        			;
		                        		
		                        			Thorax
		                        			
		                        		
		                        	
10.Cavernous Hemangioma in the Anterior Mediastinum.
Dae Hyeon MAENG ; Young Nam YOUN ; Kyoung Young CHUNG ; Hyo Chae PAIK
The Korean Journal of Thoracic and Cardiovascular Surgery 2002;35(1):82-85
		                        		
		                        			
		                        			Cavernous hemangiomas of the mediastinum are rare tumors. A 3 year and 8 month-old female patient was referred because of an abnormal chest radiograph. Chest X-ray revealed abnormal shadow occupying nearly the entire left thoracic cavity. Surgical excision was performed and pathologic diagnosis was confirmed as 15X10 cm sized cavernous hemangioma. On the eighth postoperative day, the patient was discharged without any complications and has been followed up without any problems.
		                        		
		                        		
		                        		
		                        			Diagnosis
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Hemangioma
		                        			;
		                        		
		                        			Hemangioma, Cavernous*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Infant
		                        			;
		                        		
		                        			Mediastinum*
		                        			;
		                        		
		                        			Radiography, Thoracic
		                        			;
		                        		
		                        			Thoracic Cavity
		                        			;
		                        		
		                        			Thorax
		                        			
		                        		
		                        	
            
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