1.Effects of plateletpheresis on platelet aggregation in healthy donors.
Heon Chan PARK ; Hyo Jin CHUN ; Dong Seok JEON ; Jae Ryong KIM ; Sang Kyun PARK
Korean Journal of Blood Transfusion 1993;4(1):55-60
No abstract available.
Blood Platelets*
;
Humans
;
Platelet Aggregation*
;
Plateletpheresis*
;
Tissue Donors*
2.Solid Pseudopapillary Neoplasm of the Pancreas with Lymph Node Metastasis in a Young Male Patient
Seyeon PARK ; Min Gyoung PARK ; Young Hoon ROH ; Dong Kyun KIM
The Korean Journal of Gastroenterology 2022;79(2):77-82
Solid pseudopapillary pancreatic neoplasms are rare. The male-to-female ratio is 1:9, and metastasis occurs only in a few cases. A 39-year-old male with a solid pseudopapillary neoplasm (SPN) with lymph node metastasis underwent ultrasonography, CT, and MRI, which revealed a mass (8 cm) in the pancreatic head. Fluorodeoxyglucose (FDG)-PET showed a hypermetabolic lymph node in the root area of the superior mesenteric artery (SMA). The patient underwent pylorus-preserving pancreaticoduodenectomy, which confirmed a peripancreatic lymph node metastasis. The lymph node of the SMA root area remained because of the encasing of the superior mesenteric artery. After 14 months of follow-up (with no adjuvant therapy initiated), the residual metastatic lymph nodes showed no change and no recurrence. In conclusion, surgery of the primary tumor for patients with SPN is recommended, even in cases with metastatic lymph nodes remaining.
3.Inflammatory Myofibroblastic Tumor Misdiagnosed as Intrahepatic Cholangiocarcinoma
Ji Weon PARK ; Song Hee HAN ; Dong Kyun KIM
The Korean Journal of Gastroenterology 2022;79(1):41-44
An inflammatory myofibroblastic tumor (IMT) is a rare tumor that is currently classified as an intermediate cancer according to the World Health Organization classification system. The pathophysiology of its occurrence is still unknown. Imaging tests, such as CT or MRI, can be helpful in diagnosis, but the final diagnosis is confirmed by a pathological examination through a biopsy and immunohistochemistry stain. The patient, in this case, presented an asymptomatic intrahepatic mass discovered incidentally on an imaging examination. Initially, intrahepatic cholangiocarcinoma was suspected, but she was finally diagnosed with IMT through a histological examination after a liver resection.
4.Artificial Intelligence and the Future of Internal Medicine Physicians.
Korean Journal of Medicine 2017;92(3):235-238
Artificial intelligence (AI) is now very closely related to the work of internal medicine physicians. Internal medicine physicians must actively cope with and study the weak AI that affects them. Active use of weak AI can result in a reduced frequency of medical accidents and improved work efficiency. However, the form of medical consultation designed to treat patients based on behavior and guidelines of simply looking for symptoms and prescribing medications will ultimately disappear. As the age of self-care has begun, directors of local internal medicine clinics may expand their business to include AI-based chronic diseases and healthcare service companies to treat chronic diseases.
Artificial Intelligence*
;
Chronic Disease
;
Commerce
;
Delivery of Health Care
;
Humans
;
Internal Medicine*
;
Self Care
5.The healing of membranous bone of rabbit after osteotomized by nd-yag laser.
Dong Kyun RAH ; Young Soo KIM ; Beyoung Yun PARK ; Jai Do SHIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1998;25(4):566-572
The osteoplasties of maxilla and mandible as the craniomaxillofacial surgery is popular and markedly developed in technically. In traditional osteoplasty, we have been use the mechanical saw, burr, cutting bar which is big sized instrument to transmit the energies to the saw or burr tips. So it is technically difficult to use such big instrument in narrow operative field Recently, the development of laser technology makes wider influence in the medical field. So, the laser is applying to high energy-using osteotomy in addition to hemangioma, tatoo, laserbrasion, hypertrophic scar and endoscopic surgery. The objective of the present study is to evaluate the extent of damage of bone and subsequent healing between the conventional mechnical saw osteotomies and the ND-YAG laser used osteotomies on the rabbit mandible angles by the histologic examination. Fifteen New Zealand white rabbits were used for the study. After exposure of rabbit's mandibular angle, one side of mandible angles were osteomized used by Nd-YAG laser and the other by the saw randomly. We compared the extent of damage and healing of laser and saw osteotomies at immediate, 2 week, 4 week, 3 months, 6 months postoperatively. The result revealed that, in two weeks after operation, the one of damaged bone was looks wider in laser osteotomies sites than by conventional mechanical saw osteotomies sites, but there is not remarkable differences between the laser and saw used group after 4 weeks, and we believe that it is possibility to use alser in craniomaxillofacial field saftly in near future.
Cicatrix, Hypertrophic
;
Hemangioma
;
Lasers, Solid-State*
;
Mandible
;
Maxilla
;
Osteotomy
;
Rabbits
6.EEG Abnormalities in Henoch-Schonlein Purpura.
Hae Won CHEON ; Dong Gun PARK ; Kee Hwan YOO ; Joo Won LEE ; Soon Kyun KIM
Journal of the Korean Pediatric Society 1994;37(11):1600-1606
Schonlein-Henoch purpura is a generalized small vessel vasculitis characterized by nonthrombocytopenic purpura, arthritis, abdominal pain and nephritis. In 1914 Osler described an allergic purpura associated with hemiplegia. After then Lewis et al. reported the cases of Schonlein-Henoch purpura associated with convulsion, coma, confusion, intracranial hemorrhage, and chorea, CNS complication has been reported in 1-8% of children and subsided spontaneously in most cases. Headache is a remarkable sympton and appears nonspecific nature. In 1991 Ostergaard and Storm reported that headache occured during the first week following skin rash and frequently showed abnormal EEG findings. We investigated prospectively the presence of a possible cerebral and renal involvement in the case of Schonlein-Henoch purpura. EEG abnormality demonstrated in 52.6% of all cases, and headache or irritability in 47.4% of all cases. A significant association was found between abnormal EEG finding and presence of headache, but was not found between EEG findings and presence of renal involvement and hypertension. Patients with abnormal EEG had no Past or famity history of febrile convulsion or ididopathic epilepsy.
Abdominal Pain
;
Arthritis
;
Child
;
Chorea
;
Coma
;
Electroencephalography*
;
Epilepsy
;
Exanthema
;
Headache
;
Hemiplegia
;
Humans
;
Hypertension
;
Intracranial Hemorrhages
;
Nephritis
;
Prospective Studies
;
Purpura, Schoenlein-Henoch*
;
Seizures
;
Seizures, Febrile
;
Vasculitis
7.Mucoepidermoid carcinoma of the upper lobar bronchus: 2 cases report.
Dong Gon CHO ; Jae Kil PARK ; Se Wha KIM ; Hong Kyun LEE
The Korean Journal of Thoracic and Cardiovascular Surgery 1991;24(5):498-504
No abstract available.
Bronchi*
;
Carcinoma, Mucoepidermoid*
8.Medical informatics methods for the clinical evidence extraction.
Mi Hwa SONG ; Dong Kyun PARK ; Young Ho LEE
Journal of the Korean Medical Association 2012;55(8):741-747
Clinical professionals gain new information to assist in patient care when they read the medical literature. Similarly, in clinical preventive medicine, medical science documents that have previously published can be searched and evaluated in order to confirm the scientific support for the clinical preventive medical service offered in order to prevent chronic disease. This paper introduces the medical informatics techniques for knowledge extraction that can become the basis for clinical practice. Particularly, it discusses the clinical document retrieval and knowledge discovery tools that can search for extracting the knowledge which the medical expert desires with data mining techniques. For example, Clinical medical personnel and medical researchers can locate the information from the latest literature rapidly or find and evaluate the scientific basis for the treatment and prevention of infection. This study can be used when they analyze the correlation between accumulated and different type of data and contributes to the detection of new knowledge. Recently, the concern about the visualization of massive data and information is high as the importance of big data has received greater attention. Contributions to this technique and decision support tools will increase gradually due to the way support for decision-making through scientific evidence for the pattern changing disease is evaluated or as one of the clinical practice guidelines is accepted.
Artificial Intelligence
;
Chronic Disease
;
Data Mining
;
Decision Support Techniques
;
Evidence-Based Medicine
;
Information Storage and Retrieval
;
Medical Informatics
;
Medical Informatics Computing
;
Patient Care
;
Preventive Medicine
9.Comparative study of the Characteristics of Collagen Synthesis by Cultured Fibroblasts in the Fetus and Adult.
Dong Kyun RAH ; Tai Suk ROH ; Beyoung Yun PARK ; Kwang Hoon LEE
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1999;26(3):377-382
With the development of antenatal diagnostic tools such as ultrasonography, some congenital anomalies or diseases can be detected in early fetal life. Routine serial antenatal check-ups have made it possible to predict the prognosis of these problems, and a few life-threatening single anatomic malformations have been treated by open fetal surgery. The experience of fetal surgery revealed that the human fetus appears to heal without any scarring. In contrast to adult animals, the response to tissue injury in the fetus is conspiciously devoid of acute inflammation. Indeed, the absence of neutrophils is perhaps the most consistent observation in fetal wounds and seems to be followed by absent or scanty fibroblast infiltration, which results in healing with sparse and well organized collagen deposition. Actually, the amount and quality of the collagen deposition were decided by the fibroblasts which infiltrated the wound. It is well known that fetal wounds have sparse collagen deposition, however, the mechanisms are still unclear. This study was designed to evaluate the role of fibroblast activity in the differences of the scar formation between the fetus and neonate. Fibroblast activity such as the cell growth rate, the amount of collagen synthesis and the synthesized collagen types of fetus(IUP 18-22 weeks) was compared with that of neonate. The amount of collagen synthesis was measured by H-proline uptake and the amount of collagen type III was measured by Western blot using antihuman procollagen type III. The cell growth rate as determined by cell proliferation from the initial cell count of 5x10(5) to cell confluence was 3.6 x 10(6) in the fetal fibroblasts compared to 2.5x10(6) in neonatal fibroblasts. Fetal fibroblast synthesize 16.9 x 10(4) cpm of collagen and neonatal fibroblasts synthesize 2.7 x 10(4) cpm of collagen. The synthesized amount of type III collagen was 2.1x10(4) ug/ml, and 1.5x10(4) ug/ml by fetal and neonatal fibroblasts, respectively. In conclusion, fetal fibroblasts grow faster and synthesize a smaller amount of collagen, but produce more type III collagen than neonatal fibroblasts.
Adult*
;
Animals
;
Blotting, Western
;
Cell Count
;
Cell Proliferation
;
Cicatrix
;
Collagen Type III
;
Collagen*
;
Fetus*
;
Fibroblasts*
;
Humans
;
Infant, Newborn
;
Inflammation
;
Neutrophils
;
Prognosis
;
Ultrasonography
;
Wounds and Injuries
10.THE EFFECTS OF PROSTAGLANDIN E1 AND ALLOPURINOL ON SKIN FLAP SURVIVAL.
Eung Sam KIM ; Dong Kyun RAH ; Kwan Chul TARK ; Beyoung Yun PARK
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1997;24(5):893-900
No abstract available.
Allopurinol*
;
Alprostadil*
;
Skin*