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곽진호 ( Jin Ho Kwak ),진규복 ( Kyu Bok Jin ),김정은 ( Jung Eun Kim ),황은아 ( Eun Ah Hwang ),한승엽 ( Seung Yeup Han ),박성배 ( Sung Bae Park ),김현철 ( Hyun Chul Kim ) 대한신장학회 2007 Kidney Research and Clinical Practice Vol.26 No.2
Posttransplant lymphoproliferative disorder (PTLD) is an uncommon but life-threatening complication of immunosuppressive therapy following solid organ transplantation. It encompasses a heterogeneous group of lymphoproliferative disorders ranging from reactive, polyclonal hyperplasia to aggressive non-Hodgkin`s lymphoma. The majority of PTLD is of B-cell origin and associated with Epstein-Barr virus (EBV) infection. Gastrointestinal involvement, especially small bowel and colon, is common in patients with PTLD, but the duodenum is rarely involved. We have experienced a case of PTLD involving the duodenum eight years after kidney transplantation in 50-year-old man. Two weeks before admission, he had complained of epigastric pain, and was diagnosed as pangastritis and duodenal ulcer by upper gastrointestinal endoscopy. He was admitted due to aggravated epigastric pain despite anti-ulcer medication. On the seventh hospital day, we found a new mass-like lesion in the pyloric area of antrum and diffuse ulceration in the duodenum by follow-up endoscopy. Histologic findings revealed diffuse large B-cell lymphoma. During reduction in immunosuppressive regimens, his conditions deteriorated rapidly. He died of sepsis associated with duodenal ulcer perforation, 18 days after diagnosis.
곽진호(Jin Ho Kwak),장혁재(Hyuk Jai Jang),김지훈(Ji Hoon Kim),안재홍(Je Hong Ahn),강길현(Kil Hyun Kang),한명식(Myeng Sik Han) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.1
Mixed squamous cell carcinoma and papillary carcinoma in the thyroid gland is a very rare malignant tumor. Primary squamous cell carcinoma of the thyroid may develop from squamous metaplasia of the follicular epithelium in a variety of pathologic conditions, such as other differentiated carcinomas of the thyroid. A 70-year-old man presented with a palpable mass on the right side of the thyroid gland. The patient underwent a right lobectomy without neck lymph node dissection. Histopathological findings revealed primary squamous carcinoma mixed papillary thyroid carcinoma. He underwent a completion thyroidectomy and radioactive iodine therapy. Adjuvant radiotherapy and chemotherapy were not performed.
곽진호(Jin Ho Kwak),이재운(Jaeun Lee) 한국정보과학회 1995 정보과학회논문지 Vol.22 No.8
네트워크(Interconnection network) 모델들로 사용되어지고 있는 Hypercube, Butterfly, Wrapped Butterfly, Cube-connected-cycles 등이 지금까지 bit binary string을 이용하여 표현되어지고 이로부터 대수적인 방법인 수론과 군론을 이용하여 주로 연구되어 왔다. 본 논문에서는, 이들 네트워크가 가지고 있는 대칭성과 국소 대칭성을 이용하여 위상적인 방법인 크기(size)가 작은 기저 네트워크(base network)상의 피복으로 표현하는 방법을 소개한다. 또한 이러한 성질을 이용하여 두 네트워크 사이의 네트워크 함수를 그들의 기저 네트워크에서 정의된 네트워크 함수를 이용하여 구성하는 방법을 제시하고, 그 구성되어진 함수의 효율성을 계산 할수 있는 공식을 유도하였다. Most standard network models, like Hypercube, Butterfly, Wrapped-butterfly, Cube-connected-cycles, etc , are described by using bit binary string, and have been examined mostly by using algebraic tools like number theory or group theory. In this paper, we introduce a new topological method to discribe them as covering networks over simple base networks by using global or local symmetries of networks. By using this new description, we obtain a method to construct network mappings between large interconnection networks when a mapping is given between their base networks, and a formula to measure the efficiency of the constructed mapping.