우리나라의 핵융합에너지 개발 정책

김창우,Kim, Chang-U 한국원자력산업회의 2006 원자력산업 Vol.26 No.11

독자적인 우주개발 능력을 확보한다

김창우,Kim, Chang-U 한국과학기술단체총연합회 2007 과학과 기술 Vol.40 No.10

이개에 발생한 각화극세포종양 편평상피암종 치험 1예

김창우,김창훈,임영한,남은숙 대한이비인후과학회 2006 대한이비인후과학회지 두경부외과학 Vol.49 No.2

Keratoacanthoma (KA) is regarded as a benign skin tumor, but sometimes it is very difficult to distinguish it from well-differentiated squamous cell carcinoma (SCC), especially when SCC has KA-like characteristics. Classical KA has a well-defined craterlike architecture without single cell invasion. We experienced a case of KA-like SCC of the auricle: the patient was 75-year old male with solitary elevated skin lesion on his left auricle. Initial impression was KA and local excision was performed. Histopathological examination revealed central crateriform depression and keratin debris with many atypical and mitotic cells. Recurrence was developed 6 weeks after the operation and secondary excisional surgery was performed. The patient remains in good status with no evidence of recurrence 10months following the operation. (Korean J Otolaryngol 2006;49:225-7)

A Case of Dysplastic Nevus of the External Auditory Canal Presenting with Conductive Hearing Loss

김창우,오소정,노영수,조성진,고은석 연세대학교의과대학 2009 Yonsei medical journal Vol.50 No.6

A nevus which is a benign melanocytic neoplasm rarely occurs within the external auditory canal (EAC). A dysplastic nevus presents atypical features both clinically and histologically, and is important as a potential precursor for melanoma. We present a case of a 33-year-old female patient with a dysplastic nevus in her EAC. Physical examination revealed a protruding mass arising from the posterior wall of the left cartilaginous EAC. The mass showed clinically characteristic findings of a melanocytic nevus. The patient underwent excisional biopsy via a transcanal approach under local anesthesia. Histopathological examination revealed an intradermal nevus with atypical melanocytes without pleomorphism. There was no evidence of recurrence two years after surgical excision A nevus which is a benign melanocytic neoplasm rarely occurs within the external auditory canal (EAC). A dysplastic nevus presents atypical features both clinically and histologically, and is important as a potential precursor for melanoma. We present a case of a 33-year-old female patient with a dysplastic nevus in her EAC. Physical examination revealed a protruding mass arising from the posterior wall of the left cartilaginous EAC. The mass showed clinically characteristic findings of a melanocytic nevus. The patient underwent excisional biopsy via a transcanal approach under local anesthesia. Histopathological examination revealed an intradermal nevus with atypical melanocytes without pleomorphism. There was no evidence of recurrence two years after surgical excision

Perianal Paget’s Disease

김창우,김연희,조민수,민병소,백승혁,김남규 대한대장항문학회 2014 Annals of Coloproctolgy Vol.30 No.5

The incidence of extramammary Paget’s disease (EMPD) is very low. An 84-year-old Korean man was treated with topical and oral medications at a local dermatologic clinic for a year, but the symptoms did not improve. He visited Severance Hospital and underwent a perianal skin biopsy and was finally diagnosed with EMPD. The authors performed a wide local excision according to a 1-cm margin around the lesion. For the skin and the soft tissue defects, bilateral inferior gluteal artery perforator flap transpositions were performed. The size of the lesion was 14 cm2 × 9 cm2, and the lateral and the basal margins were all disease free.

Usefulness of the Attic Reconstruction Using the Tragal Cartilage and Perichondrium for Prevention of a Retraction Pocket

김창우,Moon Il Park,Sun-Min Park,Jong Joo Lee,Hyeon-Seong Kim 대한청각학회 2011 Journal of Audiology & Otology Vol.15 No.3

Introduction Canal wall up mastoidectomy surgery is performed to preserve the external auditory canal posterior wall in patients who have a destroyed epitympanum due to middle ear disease or other surgical procedures. One adverse side effect of this surgery is the possibility of formation of a retraction pocket in the tympanic membrane. The degree of Eustachian tube disability that may occur due to attic retraction after middle ear surgery is also an important consideration. A number of factors including defects in the external auditory canal, such as attic destruction, are major causes of retraction pockets.1) The occurrence of a retraction pocket in the attic can induce ossicle erosion, thereby causing conductive hearing loss and progression to repetitive otorrhea or cholesteatoma as the retraction pocket worsens. Therefore, an appropriate treatment is necessary to prevent bone loss in the epitympanum and the formation of a postoperative retraction pocket. The tympanic attic is typically reconstructed using bone fragments2) or cavum conchae cartilage,3,4) or defects are treated with tragal cartilage5) or artificial implants.6) However, if maintenance of the normal structure of the attic fails after reconstruction, then canal down mastoidectomy surgery should be performed, which involves removal of the posterior external auditory canal posterior wall. Therefore, the choice of the appropriate method is important in handling bone defects of the epitympanum during the initial surgery. In this study, the epitympanum was reconstructed using tragal cartilage and perichondrium in patients with attic destruction due to cholesteatoma. The effectiveness at preventing the formation of a retraction pocket was evaluated by observing and analyzing these patients postoperatively for more than a year. The findings reported here will help in the choice of an appropriate treatment method for attic destruction during the initial surgery. Subjects and Methods Subjects Attic reconstruction was performed using tragal cartilage from January 2005 to January 2009. Patients' medical records and surgical findings were reviewed retrospectively for 46 patients who were available for follow-up for more than one year. The patients were 27 men and 19 women aged 12 to 72 years old (average age 43.1 years). Attic reconstruction was only performed when bone destruction by the attic cholesteatoma was confined to the epitympanum. Exclusion criteria included cases of adhesion or retraction pocket in the pars tensa of the tympanic membrane, cholesteatoma in the middle ear, perforation or reoperation, Eustachian tube dysfunction, or unidentified pnuematization in the middle ear [such as sclerotic pneumatization in the mastoid from temporal bone computed tomography (CT)]. Operation (Fig. 1)A posterior auricular skin incision was made and a musculoperiosteal flap (an anterior based flap) was formed. An external auditory canal skin incision was made in the direction of 5 o'clock to 10 o'clock for the right ear (2 o'clock to 7 o'clock direction for the left ear) at a distance of about 3 mm from tympanic ring. This incision was designed to pass the lateral portion of the bone destruction in the epitympanum area. A tympanomeatal flap was made to separate the tympanic membrane from the manubrium and to expose the destroyed bone area of the epitympanum. Mastoidectomy surgery and posterior tympanotomy was performed, and both cholesteatoma and granulation tissues were removed by removing the incus and malleus head, depending on the state of the cholesteatoma erosion. Cartilage was harvested from the ipsilateral tragus together with perichondrium. The harvested tissue was trimmed so that the perichondrium extended 2 mm beyond the cartilage border on one side, when designing cartilage to fit the size of the destroyed epitympanum. This tissue was placed between the bony portion of the external auditory canal and the temporalis fascia, for tympanic membrane inserti... Background and Objectives: Bone defect of the attic wall is a critical cause of the postoperative retraction pocket after canal wall up mastoidectomy. So, proper treatment of the attic defect is important and attic reconstruction is an acceptable procedure but it is controversial when the attic is reconstructed or not. The aim of this study is to analyze the usefulness of the attic reconstruction using tragal cartilage and perichondrium for prevention of retraction pocket and propose the indication to perform the attic reconstruction. Subjects and Methods: We retrospectively reviewed the medical records of 46 consecutive patients who underwent tympanomastoidectomy and attic reconstruction using tragal cartilage between January 2005 and January 2009. The follow-up period varied from 12 to 65 months, with the average period of 34 months. We analyzed postoperative status of the scutum and the tympanic membrane, and development of the residual or recurrent cholesteatomas and evaluate development of the retraction pocket according to the preoperative size of the bony defect of the scutum and status of the ossicular chain. Results: Retraction pocket was developed in the 13% of the operations and most of the cases had large attic destruction more than 3 mm and destructed ossicular chain. Conclusions: Attic reconstruction using tragal cartilage is a simple method to repair the bony defect of the external ear canal and effective in preventing postoperative retraction pocket if the size of destructed scutum is less than 3 mm.

Heiner Muller의 사극에 나타난 프로이센 시대의 의미지평

김창우 慶北大學校 語學硏究所 1993 語文硏究 Vol.18 No.-

구조 특집 (II) : 강구조계산규집과 실무상의 문제

김창우 대한건축학회 1975 建築 Vol.18 No.6

외국구조전문가들과 합동으로 설계에 종사할때 그들이 자국의 구조계산기준을 자부하고 완전히 신뢰하여 어떤 경우고 그 규준에서 한발도 벗어 나려고 생각도 않는 것을 볼때 그 설계가 자연 믿음직스러운 것이 되어질 듯한 느낌을 주었다. 물론 어떤 분들은 연구를 연속, 규준을 비판 검토하고 늘 더욱 더 좋은 것으로 고치어 가야겠지만 그러나 구조의 특 특수성으로봐서 대다수의 설계실무자는 그 규준을 그대로 믿고 그대로만 집행을 한다는 것은 마치 해일 동녁에서 태양이 뜬다는 것과 마찬가지로 중요한 것이다. 왜냐하면 설계규준에 정하여진 것은 꼭 지켜져야만 할 극히 기본적인 규칙이 있을 뿐이고 이것 때문에 창의성있는 설계를 못한다던가 그런 일은 없고 여기서 규정한 것은 사실 거기서 벗어나면 사고가 생길 수도 있는 선만을 설정했기 때문이다. 그 많은 건물을 매년 설계해 가는 국내의 모든 구조인은 명확한 표현과 명료한 영상으로 된 규준을 바탕으로 창의성있는 설계를 무한 발전시켜야 할 것이다.

우리나라 원자력산업과 방사선이용의 전망

김창우,Kim, Chang-U 한국동위원소협회 2000 동위원소회보 Vol.15 No.2

Laparoscopic Resection of Presacral Tumor: A New Approach  in the Era of the Minimally Invasive Surgery

김창우,이석환 대한내시경복강경외과학회 2019 Journal of Minimally Invasive Surgery Vol.22 No.3

Presacral tumors are rare; however, once diagnosed, surgical resection is recommended even in asymptomatic patients as there is potential risk for growth or malignant transformation. Many different types of surgical approaches to resect presacral tumors have been reported including posterior, anterior, and combined abdominosacral approaches. With introduction of the minimally invasive approach, laparoscopic or robotic approaches to resect presacral tumors are reported increasingly. We report a case of successful anterior laparoscopic resection for a presacral mass that was incidentally diagnosed during management of pancreatitis.