• Korean Journal of Bronchoesophagology
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• v.16 no.1
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• pp.20-26
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• 2010

Transoral $CO_2$ Laser Microsurgery of glottic Carcinoma is replacing external approaches. The qualify of life after surgery for laryngeal cancer may be as important as complete resection of the tumor for patient. Transoral $CO_2$ laser cordectomy for the management of early laryngeal cancer has advantages with regard to oncological results, preservation of laryngeal functions, morbidity and cost in comparison to those of open surgery or radiation therapy. Moreover, transoral laser surgery can be a useful choice as a salvage surgery in radiation therapy failed early glottic cancer. A classification of laryngeal endoscopic cordectomies which included eight different types was described by the European laryngological Society in 2000. We will also introduce type VI which was newly proposed recently.

• Korean Journal of Head & Neck Oncology
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• v.10 no.2
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• pp.163-170
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• 1994

Segmental mandibulectomy causes severe functional disability and cosmetic problem. Many methods of reconstruction have been used but none of these procedures provides the ideal solution. There has been increased interest in the possibility of preserving a portion of the mandible and still carrying out a adequate tumor resection. We experienced four cases of marginal with sagittal mandibulectomy in patients with floor of mouth. buccal. and soft palate carcinoma, and sagittal mandibulectomy in 8 patients with tonsillar carcinoma and a case of marginal mandibulectomy in tonsillar cancer patient. In all cases mandible facing the tumor were successfully resected and repair of the mandible. postoperative facial contour were satisfactory. We think. that these sagittal procedures are oncologically sound in its removal of tumor. biomechanically secure and maximize postoperative rehabilitation while maintaining the normal contour of the face.

• Korean Journal of Head & Neck Oncology
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• v.10 no.2
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• pp.137-144
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• 1994

To provide the wide and satisfactory surgical field is essential requirement for en-bloc resection of nasopharyngeal angiofibroma invading central skull base. The new design of the surgical approach to the skull base lesions was developed and described the details of this technique and its usefullness. We compared the usefullness of naso-maxillary approach to that of infratemporal fossa approach in cases of angiofibroma invading skull base. Our experience indicates that the naso-maxillary swing approach is better than lateral approach for the large nasopharyngeal angiofibroma. A new approach. naso-maxillary swing approach. is described.

• Korean Journal of Audiology
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• v.23 no.1
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• pp.59-62
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• 2019

Primary tumors arising from the external auditory canal (EAC) are rare. We describe two cases of mass lesions within the EAC causing slowly progressive hearing loss without otorrhea or otalgia. Otoendoscopic examination demonstrated total obstruction of the EAC, and pure tone audiometry revealed conductive hearing loss. Based on the findings of the histopathologic examination, one patient was diagnosed with venous hemangioma that was treated using surgical resection, and the other patient was diagnosed with diffuse large B-cell lymphoma (DLBCL) that was treated using external-beam radiation therapy. Although primary tumors in the EAC are rare, both benign tumors such as venous hemangiomas and malignant lesions such as DLBCL should be considered as possible differential diagnoses of mass lesions in the EAC.

• Journal of Audiology & Otology
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• v.23 no.1
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• pp.59-62
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• 2019

Primary tumors arising from the external auditory canal (EAC) are rare. We describe two cases of mass lesions within the EAC causing slowly progressive hearing loss without otorrhea or otalgia. Otoendoscopic examination demonstrated total obstruction of the EAC, and pure tone audiometry revealed conductive hearing loss. Based on the findings of the histopathologic examination, one patient was diagnosed with venous hemangioma that was treated using surgical resection, and the other patient was diagnosed with diffuse large B-cell lymphoma (DLBCL) that was treated using external-beam radiation therapy. Although primary tumors in the EAC are rare, both benign tumors such as venous hemangiomas and malignant lesions such as DLBCL should be considered as possible differential diagnoses of mass lesions in the EAC.

• Journal of Digestive Cancer Research
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• v.4 no.2
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• pp.77-82
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• 2016

The 26^th World Congress of the International Association of Surgeons, Gastroenterologists and Oncologists (IASGO) was held in Seoul, Korea from September 8 to 10, 2016. In this congress, I gave a State-of-the-Art Lecture II entitled "Mesenteric Approach in Pancreatoduodenectomy." The ideal surgery for pancreatic head cancer is isolated pancreatoduodenectomy, which involves en bloc resection using a non-touch isolation technique. My team has been developing isolated pancreatoduodenectomy for pancreatic cancer since 1981, when we developed an antithrombogenic bypass catheter for the portal vein. In this operation, the first and most important step is the use of a mesenteric approach instead of Kocher's maneuver. The mesenteric approach allows dissection from the non-cancer infiltrating side and determination of cancer-free margins and resectability, followed by systematic lymphadenectomy around the superior mesenteric artery. This approach enables early ligation of the inferior pancreatoduodenal artery and total mesopancreas excision. It is the ideal surgery for pancreatic head cancer from both oncological and surgical viewpoints. The precise surgical techniques of the mesenteric approach are herein described.

• Korean Journal of Bronchoesophagology
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• v.2 no.1
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• pp.57-62
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• 1996

Tracheal stenosis can be classified into intrinsic stenosis secondary to tracheal inflammatory lesion or mass effect and extrinsic stenosis secondary tumors of thyroid, esophagus and mediastinum. Extrinsic stenosis which is frequently encountered in clinical setting could be often overlooked due to mild symptom. Recently, even with the increasing interest in extrinsic tracheal stenosis there are limitation in it's diagnosis and treatment. The purpose of this study is to provide guidance in the diagnosis and treaonent of extrinsic tracheal stenosis. Here, we report the etiology, symptoms, radiologic findings, pulmonary fuction finding, treatment and its results in 26 cases of extrinsic tracheal stenosis. Causes of extrinsic tracheal stenosis included compression of aiway by thyroid benign tumor in 13 cases to be the most common, next by thyroid malignancy in 9 cases, metastatic mediastinal turner in 2 cases, 1 case each for esophageal cancer and parathyroid cancer. In 3 cases simple tracheal resection and end to end anastomosis were done, 1 cases underwent total laryngectomy, and 8 cases were treated by conservative management, where all cases failed in treatment. The remaining 14 cases were successfully treated by removing the causes and maintaining tracheal tube insertion for amount of time. Extrinsic tracheal stenosis due to benign conditions were treated satisfactorily by removing mass, however with the malignant causes there was considerable amount of difficulty in treatment.

• Journal of Yeungnam Medical Science
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• v.21 no.1
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• pp.120-126
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• 2004

Sinonasal Undifferentiated Carcinoma (SNUC) is a very rare, highly aggressive malignant tumor of the nasal cavity and paranasal sinuses. SNUC tends to present with advanced-stage disease, often with intracranial invasion. It requires an aggressive multimodality therapy that includes surgical resection. A cure rate of less than 20% is generally reported in the literature, with most patients dying within 1 year of onset of the disease. Three patients diagnosed as SNUC were treated at the Yeungnam University Medical Center between the years 2000 and 2003 were analyzed retrospectively. All patients presented with the disease very advanced. The three cases were given chemotherapy or chemotherapy with radiotherapy. Two patients died of the disease, surviving only 6 and 11 months following treatment, respectively. We did a follow-up on just the one remaining case with incomplete controlled disease for 27 months. The overall prognosis of SNUC is very poor. We consider that more intensive multimodality therapies are recommended for all patients with SNUC.

• Korean Journal of Head & Neck Oncology
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• v.27 no.1
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• pp.54-58
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• 2011

Objectives : There are many reports on attempts to minimize complications and recurrences of tumor by several techniques for benign parotid tumor resection. The purpose of our study is to find out meaning of procedure without identifying main trunk of facial nerve compared to conventional parotidectomy. Material and Methods : We classified 121 patients into two groups. Patients who were underwent superficial parotidectomy or partial superficial parotidectomy were included in idenitification group(IF group), and patients who were treated with conservative partial parotidectomy or extracapsular dissection without identification of main trunk of facial nerve were included in the non-identification group(NF group). We analyzed the location of tumor, operation time, mean drainage duration, complication, recurrence and cosmetic satisfaction in two groups. Results : NF group has shorter operation time and mean drainage duration than IF group, however there is no significant difference in complication and recurrence between two surgical techniques. The Cosmetic satisfaction was similar between two groups. Conclusion : Limited parotidectomy without finding main trunk of facial nerve may be reliable option for benign parotid tumors because it has advantages such as less operation time and mean drainage duration without increasing in recurrence or complication rate.

• Korean Journal of Head & Neck Oncology
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• v.19 no.2
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• pp.184-187
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• 2003

Synovial sarcoma is usually found near large joints and bursae of the extremities. Only 10% of all synovial sarcomas occur in the head and neck. The most common site affected in the head and neck is the hypopharynx, and very rare in the infratemporal fossa. Treatment of synovial sarcoma of the head and neck is difficult and must have multimodality which consists of operation, radiation and chemotherapy. Prognosis is associated with completeness of resection. We reported a case of synovial sarcoma arising from the infratemporal fossa, the first case in Korea, with review of literature.