1.Clinical application of computer in plastic surgery.
Hyeong Jae AHN ; Sung Tack KWON
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1991;18(6):1023-1031
No abstract available.
Surgery, Plastic*
4.Effect of Preoperative Chemotherapy.
Jae Kyung LEE ; Hyeong Soo CHOI ; Ki Woong SUNG ; Hee Young SHIN ; Hyo Seop AHN
Korean Journal of Pediatric Hematology-Oncology 1997;4(1):105-117
BACKGROUND: The survival rate of children with neuroblastoma has been improved over 20 years, excluding the metastatic disease, in which it does not exceed 20% so far. New treatment modalities have been developed to improve the outcome in metastatic disease. Preoperative chemotherapy reduce the size, the vascularity and the adhesiveness, so increase the resectability of the primary tumor. This retrospective clinical study was designed to review the survival rate in neuroblastoma and to analyze the effect of preoperative chemotherapy in the view point of neoadjuvant therapy on long-term survival in advanced disease. METHODS: One hundred and thirty-four cases were reviewed from 135 patients with neuroblastoma registered at the Department of Pediatrics in Seoul National University Children's Hospital from January, 1985 till December, 1995. The survival rate was reviewed according to the stage. The age, sex of the patients, the stage, anatomical site of the tumor, the level of serum ferritin and neuron-specific enolase were analyzed for the risk factors on survival. RESULTS: Ranges of age at diagnosis were from 1 month to 166 months with the median of 39 months. Five year survival rates and five year disease-free survival rates were 100%, 100% in stage 1(n=5), 90.9%, 90.9% in stage 2(n=13), 43.4%, 40.6% in stage 3(n=19), 27.1%, 19.8% in stage 4(n=95) and 100%, 100% in stage 4S(n=2), respectively. In stage 3, five year survival rate was 52.5% in group receiving neoadjuvant chemotherapy, 28.6% in control group(P=0.02). Five year disease-free survival rate was also noted as 48.6%, 28.6% in each group(P=0.02). In stage 4, five year and ten year survival rates were 27.6%, 23.6% in group receiving neoadjuvant chemotherapy, 26.9%, 0% in control group(P=0.02). Five year and ten year disease-free survival rates were 14.3%, 14.3% in group receiving neoadjuvant chemotherapy, 20%, 0% in control group (P=0.11). In univariate analysis, the age, the stage, and the site of primary tumor appeared to affect the long-term survival. CONCLUSION: Neoadjuvant chemotherapy and delayed primary surgery contribute for advance in survival in advanced neuroblastoma via increasing the resectability of the primary tumor.
Adhesiveness
;
Child
;
Diagnosis
;
Disease-Free Survival
;
Drug Therapy*
;
Ferritins
;
Humans
;
Neoadjuvant Therapy
;
Neuroblastoma
;
Pediatrics
;
Phosphopyruvate Hydratase
;
Retrospective Studies
;
Risk Factors
;
Seoul
;
Survival Rate
5.Natural History and Visual Prognosis of Idiopathic Choroidal Neovascularization.
Jae Kyoun AHN ; Hum CHUNG ; Hyeong Gon YU
Journal of the Korean Ophthalmological Society 2003;44(3):655-662
PURPOSE: To examine long-term natural history and visual prognosis of idiopathic subfoveal or juxtafoveal choroidal neovascularization (CNV). METHODS: A retrospective review of fourteen eyes diagnosed as idiopathic CNV at Seoul National University Hospital was done. Patients under 40 years old whose follow-up period of more than 36 months without treatments were included. Best corrected visual acuity (BCVA) with biomicroscopic and fluorescein angiographic examinations was measured at the initial and final visit. Clinical factors correlated with final visual acuity were analyzed. RESULTS: Mean age was 34 years ranged from 20 to 40 years and male to female ratio was 4 to 10. Patients were followed for a median of 45 months (range, 36-60 months). On initial examinations, BCVA in 14 eyes was over 0.15 with eight eyes under 0.5 and with six eyes over 0.6. Subfoveal CNV were in 12 eyes and juxtafoveal were in 2. All had the size smaller than 1DD (disc diameter). On the final visit, BCVA in 14 eyes was over 0.2 with three eyes under 0.5 and 11 eyes more than 0.6. Five eyes (36%) retained visual acuity and 8 eyes (57%) improved more than two lines. BCVA in one eye deteriorated two lines. In 6 eyes (42%), CNV was found to be regressed after the follow-up period. Initial visual acuity was significantly correlated with final visual acuity (p=0.013, Pearson correlation test). CONCLUSIONS: Idiopathic CNV has favorable visual prognosis and a tendency of spontaneous involution.
Adult
;
Choroid*
;
Choroidal Neovascularization*
;
Female
;
Fluorescein
;
Follow-Up Studies
;
Humans
;
Male
;
Natural History*
;
Prognosis*
;
Retrospective Studies
;
Seoul
;
Visual Acuity
6.The Development of Recurrent Choroidal Neovascularization in a Patient with Choroidal Coloboma.
Sun Ho LEE ; Jae Kyun AHN ; Hyeong Gon YU
Korean Journal of Ophthalmology 2011;25(1):63-65
We report a case of recurrent choroidal neovascularization (CNV) in an eye with chorioretinal coloboma. A 36-year-old woman presented complaining of decreased visual acuity (VA) in her left eye. Best corrected visual acuity (BCVA) was 20/200 and iris coloboma was observed. Funduscopy and fluorescein angiography (FA) showed CNV in the superior extrafoveal region with chorioretinal coloboma reaching just inferior to the optic disc. No other cause for CNV was observed except for the chorioretinal coloboma. BCVA improved to 20/30 after laser photocoagulation. She revisited our clinic for deteriorating VA (20/400) in the same eye 3 years after treatment. Funduscopy and FA demonstrated recurrent CNV with subfoveal hemorrhage. Photodynamic therapy (PDT) was followed by three consecutive intravitreal bevacizumab injections (IVB) for the subfoveally-located CNV. However, the CNV persisted with the appearance of a fresh subretinal hemorrhage. Additional PDT was combined with IVB on the same day 6 months after the initial PDT. The CNV regressed 3 months after treatment and has not recurred as of 8 months after the last treatment. The patient's BCVA improved to 20/60. This case suggests that PDT combined with IVB can be an alternative treatment for the management of recurrent CNV after laser photocoagulation in eyes with chorioretinal coloboma.
Adult
;
Angiogenesis Inhibitors/administration & dosage
;
Antibodies, Monoclonal/administration & dosage
;
Choroid Diseases/*complications/drug therapy/surgery
;
Choroidal Neovascularization/diagnosis/*etiology/physiopathology
;
Coloboma/*complications/drug therapy/surgery
;
Female
;
Fluorescein Angiography
;
Fundus Oculi
;
Humans
;
Intravitreal Injections
;
Laser Coagulation
;
Photochemotherapy
;
Recurrence
;
Visual Acuity
7.Effects of intracerebroventricular angiotensin II on the response to hemorrhage in conscious normotensive and hypertensive rats.
Dong Kuk AHN ; Dong Wook CHEON ; Yoon Yub PARK ; Hyeong Jin KIM ; Jae Sik PARK ; Won Jung LEE
Journal of Korean Society of Endocrinology 1993;8(2):141-148
No abstract available.
Angiotensin II*
;
Angiotensins*
;
Animals
;
Hemorrhage*
;
Rats*
8.Reversible severe tricuspid regurgitation with right heart failure associated with thyrotoxicosis.
Won Il JANG ; Eun Mi KIM ; Kye Taek AHN ; Jae Hyeong PARK ; Si Wan CHOI
Korean Journal of Medicine 2007;73(2):206-209
Left-sided heart failure can be complicated in the patient suffering with thyrotoxicosis; however, predominantly right heart failure in thyrotoxic patients is a rare condition. We present here a case of reversible right-heart failure with severe tricuspid regurgitation associated with thyrotoxicosis. A 71-year-old woman was admitted to the hospital because of a 10-day history of shortness of breath and indigestion. On echocardiography, there was a normal-sized left ventricle with preserved systolic and diastolic function. However, the right atrium and ventricle were dilated, and there was incomplete systolic coaptation of the tricuspid leaflets, resulted in severe tricuspid regurgitation. The maximal velocity of tricuspid regurgitation was 3.7 m/sec and the estimated pressure gradient between the right two chambers was 55 mmHg. After treatment that included diuretics and antithyroid drug (methimazole), the symptoms of right heart failure resolved. Four weeks later, a second echocardiogram was obtained revealing a normalized right atrium and ventricle, trivial tricuspid regurgitation and the resting pulmonary hypertension had disappeared.
Aged
;
Diuretics
;
Dyspepsia
;
Dyspnea
;
Echocardiography
;
Female
;
Heart Atria
;
Heart Failure*
;
Heart Ventricles
;
Heart*
;
Humans
;
Hypertension, Pulmonary
;
Thyrotoxicosis*
;
Tricuspid Valve Insufficiency*
9.Phenotypic Characteristics of CD8(bright) T Cells in Behcet's Uveitis.
Jae Kyoun AHN ; Hyeong Gon YU ; Young Joo KIM ; Young Suk YU ; Hum CHUNG
Journal of the Korean Ophthalmological Society 2005;46(7):1210-1216
PURPOSE: To determine the phenotypic characteristics of peripheral CD8(bright) T cells. METHODS: Forty patients with Behcet's disease (BD) with uveitis (active: 20; inactive: 20) and 20 healthy controls were recruited in this study. Phenotypic analysis of fresh PBMCs was performed using anti-CD8 mAb and anti-CD56 mAb in conjunction with a three- or four-color immunofluorescence tests for the expression levels of the following molecules: CD11b, CD27, CD45RA, CD45RO, CD62L, CD94, NKG2D, and HLA-DR. RESULTS: CD27 and CD62L were down-regulated on peripheral CD8(bright) T cells in patients with active Behcet's uveitis in contrast to the up-regulation of CD11b and HLA-DR. These phenotypic natures were remarkable in the CD56+ subsets. CD45RA(dim)CD45RO- phenotypes were expanded in peripheral CD8(bright)CD56+ T cells according to the disease activity. Interestingly, in active Behcet's uveitis, CD94 was up-regulated on peripheral CD8(bright)CD56+ T cells in BD in contrast to the down-regulation of NKG2D compared with the normal controls. CONCLUSIONS: CD8(bright)CD56+ T cells are characterized by activated effector phenotypes with functional NK receptors and they may play immunopathogenic roles in Behcet's uveitis.
10.A Case of Candida Albicans Cystitis.
Bo Seon YUN ; Ju Hwan AHN ; Jae Hyeong RHO ; Seong Ju HONG ; Min Seong LEE
Korean Journal of Urology 1995;36(12):1412-1414
Candida albicans cystitis is an uncommon but well described complication of modern therapeutics. The significance of systemic factors in the defense of the urinary tract against candidal infection is unknown. However, secretions from the prostate grand in men and from periurethral glands in women have been reported to be fungistatic. Conditions that predispose to candiduria include diabetes mellitus, antibiotic and corticosteroid therapy and disturbance of urine flow. Cystoscopy with bladder biopsy are necessary to rule out bladder tumor. We report a case of BPH with candidal cystitis and review the relevant literatures.
Biopsy
;
Candida albicans*
;
Candida*
;
Cystitis*
;
Cystoscopy
;
Diabetes Mellitus
;
Female
;
Humans
;
Male
;
Prostate
;
Urinary Bladder
;
Urinary Bladder Neoplasms
;
Urinary Tract