Dermabrasion involves the removal of the epidermis and the upper dermis by means of a motor-driven rotary abrasive instrument or a brush using ethyl chloride or dichlorotetrafluoroethane(Freon) as the evaporative refrigerant-anesthetic. Kurtin(1952) developed this refrigeration-abrasion method and named it skin planing. The technique of skin planing was introduced to Korea in early 1960s and it was extensively used for corrective surgery of scar induced by small pox until early 1970s. The indication for dermabrasion includes correction of scars, prophylaxis and correction of aging of the skin, removal of congenital nevoid anomalies, malignant and benign skin tumors, tattoos and others. The authors dermabased the cutaneous lesions of xeroderma pigmentosum, angiofibroma (adenoma sebaseum), nevus sebaceus of Jadassohn, epidermal verrucous nevus and linear porokeratosis, using Stryker' pneumatic powered dermabrader, with successful results. The technique of dermabrasion and the literature were briefly reviewed.
Aging ; Angiofibroma ; Cicatrix ; Dermabrasion* ; Dermis ; Epidermis ; Ethyl Chloride ; Korea ; Nevus, Sebaceous of Jadassohn ; Porokeratosis ; Skin ; Skin Diseases* ; Xeroderma Pigmentosum

Cardiac relaxation is impaired in many cardiac disorders and is the subject of extensive investigation. Though measurement of isovolumic relaxation time ought to prove a simple means of quantifying such abnormalities in clinical practice, the problem of defining the timing of mitral valve opening at the onset of ventricular filling has been a difficulty. previous studies have used the 'O' point of the apexcardiogram, but more recently it has been shown that this may be open to considerable error. It was the purpose of the present study to determine the duration of true isovolumic relaxation and the factors influencing its duration, and to evaluate its use as a simple noninvasive measurement of cardiac dynamics in terms of the present approach. True isovolumic relaxation time (IRT) was measured noninvasively from the onset of the aortic component of the second heart sound to the onset of rapid opening of the mitral leaflets from simultaneous recording of echocardiogram, phonocardiogram, electrocardiogram and carotid tracing in 60 normal subjects, 30 male and 30 female and in 50 with hypertension, 28 male and 22 female ranging in age from 20 to 45 years. 1. The duration of IRT was 53.6+/-9.9 msec in normal subjects with no relation to sex. 2. IRT was related to heart rate, systemic blood pressure, and systolic and diastolic time intervals. 1) IRT tended to decrease with increasing heart rate and a regression equation for predicting it in relation to heart rate was 'IRT(msec)=88.97-0.466xH.R.(beats/min)' (P<0.01). 2) IRT tended to increase with increasing systemic blood pressure and a regression equation for predicting it in relation to aortic closing pressure was 'IRT(msec)=5.09+0.459xaortic closing pressure(mmHg)' (P<0.01). IRT was prolonged in patient with hypertension. 3) IRT was in close relation to left ventricular contraction indices such as preejection period(PEP), isovolumic contraction time and preejection period/left ventricular ejection time ratio. 4) There was no relation between IRT and left ventricular pump performance indices such as stroke volume, ejection fraction, fractional shortening and left ventricular dimension. 5) There was strong association between IRT and diastolic time intervals. Authors were impressed through this study that IRT is a useful measurement of left ventricular dynamics in early diastole.
Blood Pressure ; Diastole ; Electrocardiography ; Female ; Heart Rate ; Heart Sounds ; Humans ; Hypertension ; Male ; Mitral Valve ; Relaxation* ; Stroke Volume

One hundred eighty-eight patients with avascular necrosis of the femoral head in adults, who were admitted and treated in Department of Orthopedic Surgery, Seoul National University Hospital between January of 1965 and May of 1985 are investigated in terms of the history, clinical data and laboratory examinations. And, the following results were obtained. 1. The incidence was higher in the 5th decade and the sex ratio between male and female was 3.3:l. 2. 106 cases (56%) had the bilateral hip involvement. 3. The most frequent etiological factor was alcohol (72 cases, 38%), followed by trauma (35 cases, 19 %), and steroid (32 cases, 17%). 4. Underlying diseases in steroid-induced avascular necrosis of the femoral head were dermopathy (9 cases), nephropathy (4 cases), pain over other joints (5 cases), systemic lupus erythematosus (2 cases), etc. 5. The time intervals between etiological events and appearances of clinical symptoms were 2 years and 3 months in the steroid induced cases, 1 year and 1 month in trauma induced ones, 2 years and 1 month in femur neck fracture cases, 2 years and 2 months in Caissons disease, and 3 years in post-irradiation 6. Bone scan was valuable in the early diagnosis of avascular necrosis of the femoral head. 7. Selective femoral head angiography show narrowing of lateral femoral circumflex artery, narrowing or obstruction of medical femoral circumflex artery, and obstruction of superior retinacular artery. 8. It is suggested that minor trauma and osteoporosis could make micro-fracture, resulting avascular necrosis of the femoral head, and the vascular change is secondary to the avascular necrosis.
Adult ; Angiography ; Arteries ; Early Diagnosis ; Female ; Femoral Neck Fractures ; Femur ; Head ; Hip ; Humans ; Incidence ; Joints ; Lupus Erythematosus, Systemic ; Male ; Necrosis ; Orthopedics ; Osteoporosis ; Seoul ; Sex Ratio

No abstract available.
Aorta*

Ultrasongraphy is a safe, noninvasive examination which should be the first procedure in the workup of apatient with a definite or suspected pelvic masses. The diagnostic schemes were derived from correlating the sonographic features with histomorphology in 230 surgically proven pelvic masses. Besides separating pelvic masses into the conventional categories of cystic, complex and solid, grayscale sonographic features of a pelvic mass canbe used to subcategorized these masses into a more useful differential diagnosis. The results are as follows; 1.The most characteristic finding of uterine myoma was midly to mederately echogenic uterine enlargement (90.7%)with a lobulated uterine margin (62.8%), and often less echogenic than the normal uterine echoes. 2. The typical ultrasonographic finding of H-mole was uterine enlargement with multiple small vesicular patterns of intrauterincontents(93%). 3. The most frequent finding of cystic teratoma was cystic mass with echogenic foci(48%), but the echogenic appearance of the lesions was extremely variable. 4. The ultrasonographic findings of ectopic pregnancywere adnexal mass(comlex or cystic), decidual proliferation of the uterus, enlargement of uterine size, fluid incul-de-sac, deveiation of uterus by adnexal mass, and psuedointrauterine appearance. 5. Ultrasound provided information leading to the correct diagnosis in 57% of cases, contributory data in 21.3%, and non-specific information in 10.4%. Errors occured in 3.9% and false-negative in 7.4%.
Diagnosis ; Diagnosis, Differential ; Leiomyoma ; Teratoma ; Ultrasonography ; Uterus

The occurrence of atrial fibillation during an electrophysiologic study or catheter ablation in patients with accessory pathways is a common problem and sometimes complicates the localization and ablation procedure of accessory pathways. In patients with sustained atrial fibrillation, it is often time-consuming to terminate atrial fibrillation by drugs or electrical cardioversion. We performed successful radiofrequency catheter ablation in a patient with right-sided accessory pathway during atrial fibrillation requiring repeated electrical cardioversion. The target site was determined by activation mapping and morphology of unipolar electrogram at a site of early ventricular activation.
Atrial Fibrillation* ; Catheter Ablation ; Electric Countershock ; Humans

The purpose of this study is to describe the magnetic resonance imaging (MR) findings of metastatic brain tumors with emphasis on the signal intensities of the lesion on MR. Thirty four patients with intracranial metastases were studies with MR imaging. The diagnosis was established on the basis of either brain biopsy or combination of brain MR findings and the presence of primary tumors. The primary tumors include lung cancer (n=18), breast cancer (n=3), stomach cancer (n=3), rectal cancer (n=1), renal cell carcinoma (n=1), hepatocellular carcinoma(n=1), ovarian cancer (n=1), thyroid cancer (n=1), melanoma (n=1) and unknown primary sites (n=4). The parenchymal lesions were solitary in 35% (12/34) and multiple in 65% (22/34). The size of the lesions was variable, ranging from several millimeters to 5cm in diameter. The corticomedullar junction of the cerebral heispheres was the most common location of the lesions (68%). The signal intensity of solid portion of the lesions was usually either isointense (44%) or hypointense (29%) on T1-weighted images, whereas it appeared in isointense (47%), hypointense (8%) or hyperintense (11%) on proton density-weighted or T2-weighted images. The remaining cases showed mixed signal intensities. The enhancement patterns were variable including nodular (<1cm) (6%), homogenous (19%), heterogeneous (10%), ring-like enhancement (22%) or mixed pattern(43%). The size of surrounding edema was larger than the tumor diameter in 76%. In conclusion, although there are no specific MR findings of intracranial metastasis except multiplicity, intracranial metastasis should be included in differential diagnosis with high priority, when a solitary mass showing isointensity on boty T1-and T2-weighted images with massive surrounding edema, especially in the corticomedullary junction of the cerebral hemispheres is encountered.
Biopsy ; Brain Neoplasms* ; Brain* ; Breast Neoplasms ; Carcinoma, Renal Cell ; Cerebrum ; Diagnosis ; Diagnosis, Differential ; Edema ; Humans ; Lung Neoplasms ; Magnetic Resonance Imaging ; Melanoma ; Neoplasm Metastasis ; Ovarian Neoplasms ; Protons ; Rectal Neoplasms ; Stomach Neoplasms ; Thyroid Neoplasms

The purpose of this study is to describe the magnetic resonance imaging (MR) findings of metastatic brain tumors with emphasis on the signal intensities of the lesion on MR. Thirty four patients with intracranial metastases were studies with MR imaging. The diagnosis was established on the basis of either brain biopsy or combination of brain MR findings and the presence of primary tumors. The primary tumors include lung cancer (n=18), breast cancer (n=3), stomach cancer (n=3), rectal cancer (n=1), renal cell carcinoma (n=1), hepatocellular carcinoma(n=1), ovarian cancer (n=1), thyroid cancer (n=1), melanoma (n=1) and unknown primary sites (n=4). The parenchymal lesions were solitary in 35% (12/34) and multiple in 65% (22/34). The size of the lesions was variable, ranging from several millimeters to 5cm in diameter. The corticomedullar junction of the cerebral heispheres was the most common location of the lesions (68%). The signal intensity of solid portion of the lesions was usually either isointense (44%) or hypointense (29%) on T1-weighted images, whereas it appeared in isointense (47%), hypointense (8%) or hyperintense (11%) on proton density-weighted or T2-weighted images. The remaining cases showed mixed signal intensities. The enhancement patterns were variable including nodular (<1cm) (6%), homogenous (19%), heterogeneous (10%), ring-like enhancement (22%) or mixed pattern(43%). The size of surrounding edema was larger than the tumor diameter in 76%. In conclusion, although there are no specific MR findings of intracranial metastasis except multiplicity, intracranial metastasis should be included in differential diagnosis with high priority, when a solitary mass showing isointensity on boty T1-and T2-weighted images with massive surrounding edema, especially in the corticomedullary junction of the cerebral hemispheres is encountered.
Biopsy ; Brain Neoplasms* ; Brain* ; Breast Neoplasms ; Carcinoma, Renal Cell ; Cerebrum ; Diagnosis ; Diagnosis, Differential ; Edema ; Humans ; Lung Neoplasms ; Magnetic Resonance Imaging ; Melanoma ; Neoplasm Metastasis ; Ovarian Neoplasms ; Protons ; Rectal Neoplasms ; Stomach Neoplasms ; Thyroid Neoplasms

The long QT syndrome is believed to result from abnormalities of cardiac sympathetic innervation and of myocardial repolarization. The therapeutic modalities for patients with ventricular arrhythmias due to the long QT syndrome include beta blocker, cardiac sympathetic denervation, pacemaker and ICD implantation. Recently, we underwent transvenous ICD implantation in a patient with this syndrome who had recurrent syncopal episodes due to rapid polymorphic ventricular tachycardia and strong family history of sudden death.
Arrhythmias, Cardiac ; Death, Sudden ; Humans ; Long QT Syndrome* ; Sympathectomy ; Syncope ; Tachycardia, Ventricular

The long QT syndrome is believed to result from abnormalities of cardiac sympathetic innervation and of myocardial repolarization. The therapeutic modalities for patients with ventricular arrhythmias due to the long QT syndrome include beta blocker, cardiac sympathetic denervation, pacemaker and ICD implantation. Recently, we underwent transvenous ICD implantation in a patient with this syndrome who had recurrent syncopal episodes due to rapid polymorphic ventricular tachycardia and strong family history of sudden death.
Arrhythmias, Cardiac ; Death, Sudden ; Humans ; Long QT Syndrome* ; Sympathectomy ; Syncope ; Tachycardia, Ventricular