Osteosarcoma probably arises from a primitive, undifferentiated mesenchyme, It is highly malignant bone tumor characterized by the invariable formation of neoplastic osteoid and tumor tissue with poor prognosis. Osteosarcoma may involve any bone, but usually arises in the metaphyseal portion of long bones, most frequently at the distal ent of the femur, the proximal end of the tibia, and the proximal end of the humerus. The authors have experienced one case (52 year old male) of osteosarcoma originating from the right patella.
Femur ; Humerus ; Mesoderm ; Osteosarcoma ; Patella ; Prognosis ; Tibia

No abstract available.
Muscular Dystrophy, Facioscapulohumeral*

The application of the arthroscope to the shoulder joint has evolved in recent years for the purpose of diagnosis and treatment. This paper presented 11 cases with various shoulder diseases treated by arthroscopy during the period from January, 1984 to September, 1985 in the Department of Orthopedic Surgery, College of Medicine, Soon Chun Hyang University. The advantages of the arthroscopy were as follows: 1. The arthroscopy made it easier to diagnose the unsolved cases by direct biopsy on the pathologic lesions in the joint. 2. The damage on the inside and outside of the shoulder joint was minimal and the post-operative incision scar was acceptable cosmetically. 3. The limitation of the joint motion did not remain due to early exercise post-operatively. 4. The complications such as infection, neurovascular injury, scuffing of joint cartilage, etc. could be avoided.
Arthroscopes ; Arthroscopy ; Biopsy ; Cartilage ; Cicatrix ; Diagnosis ; Joints ; Orthopedics ; Shoulder Joint ; Shoulder

Dermatitis herpetiformis is a chronic, intensely itchy, papulovesicular skin disorder of unknown cause, which is usually symmetrically distributed on extensor surface. Most patients have an associated gluten-sensitive enteropathy which is usually asymptornatic. We report six cases of dermatitis herpetiformis diagnosed by direct immunofluorescence studies. The patients have had characteristic features of dennatitis herpetiformis, such as vesicles, erythernatous papules, urticaria-like plaques, and hypopigmentation or hyperpigmentation, dispersed on the neck, back, and arms. None of the patients had subjective symptoms associated with gluten-sensitive enteropathy. Clinicians should be aware of the clinical features of this disease to avoid possible misdiagnosis, and to provide better therspeutic approaches in time.
Arm ; Celiac Disease ; Dermatitis Herpetiformis* ; Dermatitis* ; Diagnostic Errors ; Fluorescent Antibody Technique, Direct ; Humans ; Hyperpigmentation ; Hypopigmentation ; Neck ; Skin

Four cases of newborn with tension pneumothorax induced by a conventional ventilator were admitted to our nursery from January 1. 1992 to June 30. 1992 and they were managed by high frequency ventilator (Infrasonic Infant Star Ventilator). In contrast, four cases of newborn with tension pneumothorax who were continuously on the conventional ventilator, were included as a control group. They were admitted to our nursery from July 1. 1991 to december 31. 1991 and they were managed by conventional ventilator with conservative treatment. 1) In the control group, who were continuously managed by the conventional ventilator after thoracostomy with water seal drainage, we changed ventilator setting appropriately in control group but they had poor arterial blood gas analysis. The arterial blood gas analysis within 24hr/within 72hr in control group were pH 7.192/7.195, Paco2 72.15/82.25, PaO2 78.92/83.875, HCO3-26.975/27.925 and conventional ventilator care did not show any definite benefit for improvement of arterial blood gas analysis and tension pneumothorax as well. 2) Two cases in control group expired on the 6th day of thoracostomy without any resolution of tension pneumothorax. 3) In contrast, four cases with tension pneumothorax managed by high frequency ventilator were improved. Tension pneumothorax and arterial blood gas analysis to normalize from 6hr of high frequency ventilation and four cases of tension pneumothorax were completely reabsorbed within 4days.
Blood Gas Analysis ; Drainage ; High-Frequency Ventilation* ; Humans ; Hydrogen-Ion Concentration ; Infant ; Infant, Newborn ; Nurseries ; Pneumothorax* ; Thoracostomy ; Ventilators, Mechanical*

We compared all frozen section examination of ovarian tumors during a 5 year period in our institute with permanent section diagnosis from paraffin sections. In this period, 604 ovarian tumors had frozen section examination. Final histologic diagnosis was divided into benign, low malignant potential and malignant. Sensitivity of frozen section diagnosis for malignant was 80 %, low malignant potential 73,1%, and benign 99.8%. Predictive value for malignancy was 98.5%, for low malignant potential 76.6%, and for benign disease 96.2%. Diagnostic problems occurred in huge tumors and low malignat potential mucinous tumors. Analysis of the 32 false negative(miss or under diagnosis) revealed that a sampling error was involved almostly. The cases of discrepancy between frozen section diagnosis and permanent section diagnosis, were 26/34 in mucinous tumors and 33/34 in huge size of tumors(more than 10cm). Although surgeons and pathologist are aware of the limitations of frozen section diagnosis of ovarian tumors, peroperative histologic examination can be worthwhile and prevent under or over treatment of ovarian malignancies.
Diagnosis* ; Frozen Sections* ; Mucins ; Paraffin ; Selection Bias

OBJECTIVE: We compared patients with chronic schizophrenia and normal controls with respect to decision-making ability. Measures were implemented to control for the participants' intelligence levels as well as to ensure to use of a moderate sample size. The goal of this study was to confirm inconsistent results from previous studies which had stemmed from too small of a sample size, highly variable performance of normal controls, and not controlling for intelligence as a confounding factor. METHODS: Fifty-two chronic stable schizophrenic inpatients and 55 healthy controls participated in the study. We controlled for intelligence by including subjects with intelligence quotient's (IQ) between 80 and 120, examining any differences in decision-making performance between groups on the Iowa Gambling Task (IGT). We also addressed several issues relating to performance on the IGT, such as working memory and clinical symptoms. RESULTS: Schizophrenic patients were found to perform poorly on the IGT relative to normal controls (F(1,105)=17.73, p<0.001); however, more importantly, they also displayed the slow yet profitable shift from disadvantageous decks to advantageous decks over time. We also found that when compared with healthy controls, schizophrenic patients showed a poorer performance on the Wisconsin Card Sorting Test (WCST)(t=-5.48, p<0.001 for perseverative error) which was not related to their performance on the IGT. CONCLUSION: Based on previous literature and the results of this study, impaired sensitivity to both reward and punishment might be a more plausible explanation for the poor performance on the IGT in the schizophrenic group. We speculated that this impairment seemed related more to the different responsiveness to the magnitude than to the frequency of punishment, and to the different interpretation of less informative verbal cues in the context of the reinforcing schedule.
Appointments and Schedules ; Cues ; Dietary Sucrose ; Gambling ; Humans ; Inpatients ; Intelligence ; Iowa ; Memory, Short-Term ; Punishment ; Reward ; Sample Size ; Schizophrenia ; Wisconsin

No abstract available.
Pregnancy*

PURPOSE: The purposes of this article are to identify CT findings distinguishing nasal polyps, that are the most common cause of the nasal polypiod lesions, from other nasal cavity masses and to identify differential points between benign and malignant masses of nasal cavity. MATERIALS AND METHODS: We classified 567 cases of pathologically proved nasal cavity masses into 4 different groups on CT according to the sites of origin and surrounding bone changes. RESULT: The nasal polyps were the most common cause of nasal cavity masses(515/567). Group I had a high diagnostic specificity for the nasal polyps (513/515, 99.6%) although inverted papilloma (8/522) and malignant melanoma(1/522) showed similar CT appearances. The representitive nasal mass of Group Ila was the inverted papilloma (15/24, 66.5% of the inverted papilloma). Group III pattern was seen in 3 cases of benign minor salivary gland tumor and 2 cases of pyogenic granuloma. Group IV suggested malignancy and thus was mostly observed in malignant tumors except I case of inverted papilloma and 1 case of granulomatous necrosis. CONCLUSION: The differential diagnosis between nasal polyps and the other nasal cavity masses is possible by characteristic bone changes and their sites of origin revealed on CT. In addition, it is possible to differentiate malignant masses from benign in most cases.
Diagnosis, Differential* ; Granuloma, Pyogenic ; Nasal Cavity* ; Nasal Polyps* ; Necrosis ; Papilloma, Inverted ; Salivary Glands, Minor ; Sensitivity and Specificity

This study was conducted to measure the lead level in the blood, scalp hair and toenail of the elementary schoolchildren and assess the relationship among those samples. Lead concentration of the blood, scalp hair and toenail was measured for l00(male 50, female 50) fourth grade elementary schoolchildren in Taegu city. The mean lead level in the blood, scalp hair and toenail was 6.00+/-2.44 microgram/dl, 6.28+/-3.54 microgram/dl 6. 68 and 7.33+/-3.18 microgram/g. The mean lead level in the blood of schoolboys was 6.43+/-2.77 microgram/dl and that of schoolgirls was 5.59+/-2.01 microgram/dl. The mean lead level in the scalp hair of schoolboys was 7.66+/-2.97 microgram/dl and that of schoolgirls was 6.88+/-3.54 microgram/g. The mean lead level in the toenail of schoolboys was 8.19+/-3.5 microgram/g and that of schoolgirls was 6.47+/-2.52 microgram/g and their difference was statistically significant. In schoolboys, the correlation coefficient between the lead level in the blood and scalp hair was 0.4909, and the data were fitted best by the regression equation Y=0.5255X+4.2810, where Y and X are scalp hair and blood concentration. In schoolgirls the correlation coefficient between the lead level in the blood and scalp hair was 0.3778, and the data were fitted best by the regression equation Y=0.6655X+2.9632, where Y and X are scalp hair and blood concentration. In schoolboys. the correlation coefficient between the lead level in the blood and in the toenail was 0.5533, and the data were fitted best by the regression equation Y=0.7076X+3.6472, where Y and X are toenail and blood concentration. In schoolgirls the correlation coefficient between the lead level in the blood and in the toenail was 0.2738, and the data were fitted best by the regression equation Y=0.3431X+4.5570 where Y and X are toenail and blood concentration. In schoolboys, the correlation coefficient between the lead level in the scalp hair and in the toenail, in the schoolboys was 0.4148, and the data were fitted best by the regression equation Y=0.4956X+4.3986, where Y and X are toenail and scalp hair concentration. In schoolgirls the correlation coefficient between the lead level in the scalp hair and in the toenail 0.1159, and the data were fitted best by the regression equation Y=0.0825X+5.9214 here Y and X are toenail and scalp hair concentration. Correlation among lead concentration in the blood, scalp hair and toenail of schoolchildren were statistically significant except between scalp hair and toenail in schoolgirls. These finding suggest that blood, scalp hair and toenail can be used substitutive samples between each others.
Daegu ; Female ; Hair* ; Humans ; Nails* ; Scalp*