1.A clinical review on the cancer of the colon and rectum.
Hyung Wook LEE ; Ho Kyung CHUN ; Dae Hyun YANG
Journal of the Korean Surgical Society 1992;43(6):862-871
No abstract available.
Colonic Neoplasms*
;
Rectum*
2.Four Cases of Congenital Choledochal Cyst.
Hyun Eog YANG ; Yoon Hee LEE ; Kyung Tai WHANG
Journal of the Korean Pediatric Society 1986;29(11):108-114
No abstract available.
Choledochal Cyst*
3.A case of Glanzmann's thrombasthenia disagnosed by SDS-PAGE analysis of platelet membrane glycoprotein.
Kyung Eun OH ; Sook Hyun PARK ; Shin Heh KANG ; Chang Hyun YANG ; Kir Young KIM ; Kyung Soon SONG
Korean Journal of Hematology 1991;26(1):181-188
No abstract available.
Blood Platelets*
;
Electrophoresis, Polyacrylamide Gel*
;
Membrane Glycoproteins*
;
Membranes*
;
Thrombasthenia*
4.Effects of Low Oxygen Condition on the Development of Mouse Embryos Cultured In Viro.
Jong Hyun WOO ; Kyung Joo HWANG ; Hyun Won YANG ; Chi Hyeong LEE ; Jeong In YANG ; Hyuck Chan KWAN ; Kie Suk OH
Korean Journal of Obstetrics and Gynecology 1998;41(12):2962-2968
OBJECTIVE: It is known that mouse embryos before implantation develop in a low oxygen environment of 3- 8% concentration and with antioxidant materials such as vitamins, antioxidant enzymes, ferrous binding proteins, and albumin in follicular and tubal fluids. However, the 20% oxygen culture condition with chemically defined media might be produce an abundance of ROS, and leads to developmental delay or developmental block in vitro. In this study, we attempt to elucidate the relationship between intracellular H2O2 production and embryo development in different oxygen culture conditions of mouse embryos. METHODS: Prenuclear embryos from C57BL/CBA Fl hybrid and ICR mouse were cultured in incubators which provided 5% carbon dioxide, 20% oxygen and 5% carbon dioxide, 5% oxygen. Measurement of H2O2 level in a embryo was performed with DCHFDA(2, 7 -dichlorodihydroflourescein diacetate)and analyzed with Quanti-cell 700, and the number of blastomeres was counted with DAPI( 4, 6'-diamidino-2-phenylindole). RESULTS: Oxygen concentration of the culture medias was significantly higher in the 20% oxygen environment compared to that of 5% oxygen environment. Culture of mice embryos in high oxygen condition leads to high HO concentrations at 2 cell stage and developmental delay or ""2-cell block"" regardless of the strain. But in a 5% oxygen environment, which is similar to in-vivo conditions HO production was suppressed continuously through out culture and development of embryos was definitely improved. CONCLUSION: These results suggest that there is a difference in the production of ROS or protective mechanism according to the mouse strains and stage of development, and it is thought that in-vitro culture in 5% oxygen environment provides stable in vivo equilibrium but in a 20% oxygen environment there is production of ROS which overcome the protective mechanism which leads to cellular damage and embryo developmental delay.
Animals
;
Blastomeres
;
Carbon Dioxide
;
Carrier Proteins
;
Culture Media
;
Embryonic Development
;
Embryonic Structures*
;
Female
;
Incubators
;
Mice*
;
Mice, Inbred ICR
;
Oxygen*
;
Pregnancy
;
Vitamins
5.Anterior Elevation Changes Following Corneal Crosslinking for Keratoconus.
Journal of the Korean Ophthalmological Society 2013;54(2):199-209
PURPOSE: To report the results according to anterior elevation changes following corneal crosslinking (CXL) treatment for keratoconus. METHODS: The present retrospective study included 14 patients (15 eyes) with progressive keratoconus who underwent CXL with a follow-up of 12 months. Patients were classified into 2 groups according to pre and postoperative anterior elevation difference maps. On the preoperative anterior elevation map, distances from maximum anterior elevation to pupil center were compared between the 2 groups. The outcome of best correct visual acuity (BCVA), maximum keratometry and parameters of corneal topography were compared between the 2 groups before CXL as well as 6 and 12 months after CXL. RESULTS: The anterior elevation changes were classified as group 1 (-7.88 +/- 10.53 micrometer) or group 2 (8.71 +/- 5.99 micrometer) (p = 0.001). The preoperative corneal topography of eyes observed in group 1 (0.19 +/- 0.13 mm) had shorter mean distances from maximum anterior elevation to pupil center than eyes in group 2 (0.47 +/- 0.23 mm) (p = 0.018). BCVA (log MAR) improved from 0.68 +/- 0.78 to 0.57 +/- 0.81 (p = 0.115) 12 months after CXL in group 1 and decreased from 0.51 +/- 0.34 to 0.56 +/- 0.38 (p = 0.109) 12 months after CXL in group 2. The maximum keratometry decreased from 63.01 +/- 19.07D to 58.95 +/- 16.32D (p = 0.017) in group 1 and increased from 60.70 +/- 9.46D to 61.29 +/- 7.51D (p = 0.674) in group 2. CONCLUSIONS: Clinical and optical effects improved postoperatively in group 1, and were stabilized in group 2. The preoperative distance from maximum anterior elevation to pupil center and the anterior elevation changes after CXL were factors in predicting the CXL outcome.
Corneal Topography
;
Eye
;
Follow-Up Studies
;
Glycolates
;
Humans
;
Keratoconus
;
Pupil
;
Retrospective Studies
;
Visual Acuity
6.A case of carcinomatous polyarthritis.
Suk In LEE ; Woo Kyung KIM ; Jae Suk JUN ; Kyung Ran BAIK ; Sung Hyun YANG ; Young Joo BANG ; Young Ok SONG
Journal of the Korean Cancer Association 1993;25(2):307-314
No abstract available.
Arthritis*
7.PVL in preterm infants:correlation of MR & US.
Joo Hyun YANG ; Yong Seok LEE ; Hyun Joo PARK ; Yu Mi CHA ; Kyung In KIM ; Hyung Sik KIM
Journal of the Korean Radiological Society 1993;29(6):1300-1305
MRI (magnetic resonance imaging ) had been the most up-to-dated modality in evaluating white matter disease in recent years, whereas US (ultrasonogram) has been used extensively in diagnosis of neonatal PVL(periventricular leukomalacia) conventionally. We evaluated the diagnostic value of MRI by reviewing the MR findings and correlation of MR and US of PVL in II preterm infants. Evaluation criteria were MR signal intensity and discrimination of PVL on each pulse sequences land comparision between MR and US findings performed simultaneously, on the extent of PVL, size of the largest cyst and detectability of hemorrhagic lesion. MR findings of 11 cases of PVL were of low signal patterns on T1WI (T1weighted image) in 7, low signal patterns of PDWI (proton density weighted image) in 9, iso signal patterns on T2WI(T2weighted image) in 8 and low signal patterns on STIR(short time inversion recovery) in 7 cases. The lesions of 11 PVL were well discriminated in all 11 cases of T1WI, 7 cases of STR, 5 case of PDWE and 2 cases of T2WI. The lateral ventricle was diffuse dilated (n=1) and focally dilated (n=3) in atrial area. In the comparative study, MR presented more extensive lesions in 7 cases, larger cysts in 6 cases out of 7 PVL and more definitive hemorrhage in 3 cases out of 4 cases than sonography. In conclusion MR was more valuable than sonography in evaluating the extent of lesions, size of the largest cystic lesion and detetion of hemorrhage. TIWI and STIR images were more useful in detection of PVL than T2WI and PDWI.
Diagnosis
;
Discrimination (Psychology)
;
Hemorrhage
;
Humans
;
Infant, Newborn
;
Infant, Premature
;
Lateral Ventricles
;
Leukoencephalopathies
;
Magnetic Resonance Imaging
8.Hemorrhagic Chicken Pox.
Joon CHUNG ; Kee Yang CHUNG ; Seung Kyung HANN ; Hyun Hee LEE ; Dong Soo KIM
Korean Journal of Dermatology 1994;32(3):509-513
Primary varicella infection usuelly runs a benign clinical course in the helthy population. However, hemorrhagic chicken pox presents with a very extensive eruption of hemorrhagic vesicles in patients with decreaed platelets or impaired immunity and is accompanied by severe constitutional symptoms. A 7-year-old male was admi due to abdompal pain for 1 day and peneralized vesicular eruption for 5 days. The eruption first appeared on the trunk and then spread to involved face, scalp and extrsmities. The skin rash was compatable with varicella but despite the administration of acclovir intravenously, the vesicular eruption became hemorrhagic. Ten days after admission, having experienced cardisc arrest twice and with his mental state in coms, he was diseharged as his situation was hopelesa. We have experienced a giatient diagnosed as having hemorrhagie, chicken pox complicated by encephalopathy.
Chickenpox*
;
Chickens*
;
Child
;
Exanthema
;
Humans
;
Male
;
Scalp
9.Foreign Body Granulomas of the Breast Presenting as Bilateral Spiculated Masses.
Boo Kyung HAN ; Yeon Hyeon CHOE ; Young Hyeh KO ; Seok Jin NAM ; Jung Hyun YANG
Korean Journal of Radiology 2001;2(2):113-116
In Asia, mammography following the injection of foreign materials into the breasts for cosmetic augmentation is frequently seen and diagnosis based on the typical radiologic findings is straightforward. We report the unusual radiologic findings in two patients with foreign body granulomas caused by injected foreign materials and discovered incidentally during screening work up. The mammographic findings were bilateral, hyperdense, spiculated masses, with occasional microcalcification, and at sonography, markedly hypoechoic, spiculated solid masses, located near the pectoralis muscle and partly extending into it, were observed. These radiologic findings mimicked malignancy.
Breast Neoplasms/radiography
;
Case Report
;
Cholesterol
;
Diagnosis, Differential
;
Esthetics
;
Female
;
Granuloma, Foreign-Body/etiology/*radiography/*ultrasonography
;
Human
;
Injections/adverse effects
;
Mammography
;
Middle Age
;
Paraffin
10.Rhinocerebral Mucormycosis with Intracerebral Hemorrhage.
Pill Jae SHIN ; Ho Kook LEE ; Chang Hyun KIM ; Kyung Hun YANG ; Do Yun HWANG
Journal of Korean Neurosurgical Society 2000;29(1):136-142
No abstract available.
Cerebral Hemorrhage*
;
Mucormycosis*