Studies were conducted in rivers in Kyungpook Province, Korea from July 1970 to September 1974 to determine the stations where Parafossarulus manchouricus, the intermediate snail host of Clonorchis sinensis, are abundant, and the infection rates of these snails with the cercaria of Clonorchis sinensis. Snail collections were made during four consecutive summers(July to September in each year). Ten snail habitats were found. The population density of the snails per square meter of the river bottom ranged from 25 to 250. The highest population of snails was encountered at the Dong-chon station. Cercaria studies by means of the immersing and crushing technics indicated surprisingly low rate of Clonorchis sinensis infection among the snails examined. The proportion of infected snails in Kyungpook Province was 0.8 per thousand of all snails examined. Results indicated that the Parafossarulus manchouricus exists in limited areas within the rivers under study and the infection of the snail with the cercaria of Clonorchis sinensis is very low.
parasitology-helminth-trematoda ; Clonorchis sinensis ; Parafossarulus manchouricus ; snail ; epidemiology

Three cases of orbital rhabomyosarcoma are reported here. Histological studies comfirmed the lesion 1:0 be the alveolar type in all cases. This tumor is a rare disease entity in Orient than Europe and America and accordingly, rarely encountered in our ophthalmologic practice, although it is the commonest primary malignant orbital tumor in children. Of the three cases reported here one occurred in adu1t and the other two in children. Case I. This 15 month old male showed a swelling of the left upper lid toward the medial side for 2 months and visited to our hospital on March 10, '69 with complaints of progressive swelling on the region with ptosis. The eye ball was slightly displaced toward the lower temporal side and ocular movement is limitted to upward. On palpation, the childthumb sized tumor was palpable in the upper nasal portion of the orbit. On excision of the tumor, the mass was found to be originated from the superior oblique muscle. The mass round measuring 2.5 X 2.5 X 1.5 cm in size. Histological diagnosis was alveolar rhabdomyosarcoma without cross-striation. No follow-up could be done. Case II. This patient of 15 month old male showed a swelling on the right lower lid existed 6 months and visited to our hospital on September 8, '69. The physical examination revealed that the left eye and the other routine examinations were within normal limits. The right eye showed the swelling of the lower lid, congestion of the palpebral conjunctiva, limitted movement of the eye ball toward the lower side and a palpable bean-sized mass on the region. The excision of tumor was performed under the general anesthesia. This mass was attached with the inferior oblique muscle with no other recognizable adhesion seemingly originating from that muscle. The mass was round and oval in shape, measuring 2 X 2 X 1 cm in size, diagnosis was alveolar rhabdomyosarcoma. The post-operative follow-up studies were unavailable. Case III. This case in one of adult alveolar rhabdomyosarcoma. At the age of 25 years, this man showed a proptosis of the right eye associated with migrain like headache, ocular pain and visual disturbance. This symptoms existed 6 months and gradually increased in intensity. On the physical examination, the left eye was found to be normal. The skull and orbit x-ray and c.b.c. were with in normal limits. The right eye revealed about 5mm proptosis compared with left eye and the adult thumb sized tumor was palpated on the inner side of the lower orbital rim. The visual acuity was in zero. The right optic disc was edematous and elevated about 4.0 D. The pupil showed marked dilatation and the light reflex was abscent and ocular movement was markedly limitted and eye ball is deviated toward the upper side. Under the general anesthesia, the exenteration of the orbit associated with the removal of tumor was carried out with no untoward complications. Origin of the mass was the inferior oblique muscle penetrating to the deeper part of the optic foraman and optic nerve was surrounded by the tumor completely Histology confirmed alveolar rhabdomyosarcoma. Follow-up study was impossible.
Adult ; Americas ; Anesthesia, General ; Child ; Conjunctiva ; Diagnosis ; Dilatation ; Estrogens, Conjugated (USP) ; Europe ; Exophthalmos ; Headache ; Humans ; Infant ; Male ; Optic Nerve ; Orbit* ; Palpation ; Physical Examination ; Pupil ; Rare Diseases ; Reflex ; Rhabdomyosarcoma* ; Rhabdomyosarcoma, Alveolar ; Skull ; Thumb ; Visual Acuity

At first, we review a sample size estimation method for log-rank test in survival analysis. Although it is widely used these days, it has a weakness for practical use. We propose a modification method to avoid the weakness.
Sample Size*

The Acromioclavicular joint is classified as a diarthrodial joint. Its stability is maintained by articular capsule, acromioclavicular ligament, articular disc, coraco clavicularligament(trapezoid and conoid ligament) and attached muscles. 17 cases of acromioclavicular dislocation which had been seen at Seoul Red Cross Hospital during the period of January 1975 through December 1977 were studied. The following observations were made. 1. This injury is more prevalent in male (82%) with the peak incidence in the 3rd and 4 th decades (53%). 2. Conservative treatment was given in 11 cases by adhersive strapping around the elbow and lateral one third of the clavicle reinforced by Velpeau dressing for 3 weeks, then followed by active exercise. 3. Operative treatment consist of modified Phemister technique in 3 cases, Mumford technique in 2 cases, and Dewar and Barington's technique in 1 case. 4. Results were evaluated in 4 groups as excellent, good, fair, and poor according to Gerald weitzman's classification(1975). 5. Overall results of more than good (satisfactory) was obtained in 72.7% of the 11 cases with conservative treatment and in 50% of the 6 cases with operative treatment.
Acromioclavicular Joint ; Bandages ; Clavicle ; Clinical Study ; Dislocations ; Elbow ; Humans ; Incidence ; Joint Capsule ; Joints ; Ligaments, Articular ; Male ; Muscles ; Red Cross ; Seoul

PURPOSE: Thyroid disease is the most common endocrine disease in childhood. Thyroid hormone has critical effects on growth and development, especially in childhood. We survey the prevalence, sex and age distribution, symptoms and thyroid function states of thyroid diseases in childhood. METHODS: Three hundred ninety one children who were diagnosed as having thyroid disease at department of pediatrics, St. Mary's hospital from Jan. 1987 to Dec. 1998 enrolled in this study. RESULTS: 1) The ratio between male and female patients was 1: 5.3. Age distribution was puberty, school age and infancy in their order of frequency. 2) The results of thyroid function tests showed normal function in 210 cases (53.7%), increased function in 95 cases(24.3%), and decreased function in 86 cases (22%). 3) Simple goiter, Graves disease, and chronic lymphocytic thyroiditis were the most common diseases in euthyroid, hyperthyroid, and acquired hypothyroid state, respectively. 4) The most common sign and symptom was goiter in euthyroid(100%), hyperthyroid(98.8%) and acquired hypothyroid state(96.2%). Forty of 68 cases(58.8%) with congenital hypothyroidism were detected by neonatal screening. CONCLUSION: Simple goiter, chronic lymphocytic thyroiditis and Graves disease were common acquired thyroid diseases in childhood, and goiter is the most common clinical manifestation in acquired thyroid disease. Recently, increasing number of congenital hypothyroidism was detected by neonatal screening test.
Adolescent ; Age Distribution ; Child ; Congenital Hypothyroidism ; Endocrine System Diseases ; Female ; Goiter ; Graves Disease ; Growth and Development ; Hashimoto Disease ; Humans ; Infant, Newborn ; Male ; Neonatal Screening ; Pediatrics ; Prevalence ; Puberty ; Thyroid Diseases* ; Thyroid Function Tests ; Thyroid Gland*

No abstract available.
Acetabulum*

Transfer of large quantities of fetal blood across the placental barrier to the maternal circulation is a rare occurrence which results in severe anemia in the newborn infants. This phenomenon is believed to occur most often during labor and delivery and apparently, is more frequent when abnormal obstetric conditions are present. However, fetal erythrocytes have been identified in the naternal circulation throughout most of pregnancy indicating some degree of constant or intermittent transplacental transfusion. We experienced a case of stillbirth due to large amount of fetomaternal transfusion. Acid elutionl test of maternal blood was positive and direct and indirect Coombs test was negative. Ultrasonographic finding on abdomen and cranium to rule out the internal hemorrhage was normal. We report a case of stillbirth due to fetomaternal transfusion with a brief review of related literatures.
Abdomen ; Anemia ; Coombs Test ; Erythrocytes ; Female ; Fetal Blood ; Fetomaternal Transfusion* ; Hemorrhage ; Humans ; Infant, Newborn ; Pregnancy ; Skull ; Stillbirth*

To examine the protection of retinal cell death by glutamate antagonists in vivo, this study was carried out in pressure-induced ischemia model. Firstly, we observed that ischemia resulted in the similar retinaldamage to the injuries caused by NMAD and Kainate toxicity. Secondly, the retinal cell death caused by ischemia was prevented by MK801 and CNQX, glutamate antagonists for NMDA and Kainate excitotoxicity, respectively at 24hr after ischemia. MK801 was shown to prevent the cell death in ganglion cell layer and CNQX in inner unclear layer. In addition, the combination of CNQX and MK801 protected the retina neuronal cell from ischemic injury better than when they were applied separately. The partial protection of retinal cell death by glutamate antagonists in ischemia model indicates that glutamate eoxicity as well as other cell death mechanism such as apoptosis mediates ischemia induced retinal cell death. Thus, cell death by other mechanism must be also blocked in order to prevent retinal cell death, completely.
6-Cyano-7-nitroquinoxaline-2,3-dione* ; Apoptosis ; Cell Death ; Dizocilpine Maleate* ; Excitatory Amino Acid Antagonists ; Ganglion Cysts ; Glutamic Acid ; Ischemia* ; Kainic Acid* ; N-Methylaspartate* ; Neurons ; Retina ; Retinaldehyde*

Studies were conducted to determine the ecology of the snail, Parafossarulus manchouricus, the seasonal variation of the snail population, and the infestation rates of these snails with the cercariae of digenetic trematodes, in the snail habitat of river Kumho, in Dongchon of Taegu city, in Kyungpook Province, Korea, from 1975 to 1979. The earliest time the snails were found was early in April every year. At that time the water temperature ranged from 13 to 14 degrees C. The population density of snails ranged from 2 to 8 per square meter. The highest population density of snails was encountered in late June and the water temperature was between 24 and 26 degrees C. The snails disappeared in early and mid-November, when the water temperature dropped to 10-13 degrees C. The average snail population in June was 115.9 per square meter in 1975 but in 1976 dropped abruptly to 30.5 and remained at approximately the same level in 1977. It then decreased at considerably lower rates, with the average of 18.7 in 1978 and 14.5 in 1979. The snails collected in the habitat were examined for the presence of cercariae of digenetic trematodes. Of these, four species, Clonorchis sinensis, Cyathocotyle orientalis, Exorchis oviformis, and Loxogenes liberum were found. The most frequently liberated cercaria was L. liberum 43.3 per cent, followed by E. oviformis 6.2 per cent and C. orientalis 1.5 per cent. The least frequently liberated was C. sinensis 0.1 per cent. In the monthly liberation rates for larval trematodes, the higher rates were observed in June, July and August every year, and the cercarial rates for Clonorchis sinensis, Cyathocotyle orientails and Exorchis oviformis demonstrate a fairly consistently fluctuating downward trend over the five-year period, except for Loxogenes liberum. Summarizing the results, this study indicated that the population density of snails in the habitat and the infection of the snail with the cercariae of digenetic trematodes has decreased over the five-year period from 1975 to 1979.
parasitology-helminth-trematoda ; Clonorchis sinensis ; Parafossarulus manchouricus ; Cyathocotyle orientalis ; Exorchis oviformis ; Loxogenes liberum ; epidemiology ; cercaria

To evaluate the consistency of the thickness and size of the corneal flap made by the Innovatome automatic microkeratome and to determine the cor-relation between preoperative variables and corneal flap dimensions, we per-formed the prospective study comprised 102 consecutive eyes of 51 patients having laser in-situ keratomileusis (LASIK)with the Innovatome microker-atome.Central corneal thickness, corneal curvature, and refractive error were measured preoperatively.All flaps were created using No.170 blades. The mean corneal flap thickness was 139.70 +/-2 2.5 6 micrometer, and the range was 93.0 ~193.7 micrometer.There was no relationship between the corneal flap thickness and the preoperative corneal curvature or spherical equivalent, but the corneal flap thickness increased with the preoperative central corneal thickness. The mean corneal flap size (vertical diameter)was 9.17 +/- 0.25 mm (range :8.5 0 ~9.7 5 mm).There was no relationship between the corneal flap diameter and the preoperative central corneal thickness or spherical equivalent, but the corneal flap size increased with the preoperative corneal curvature.
Humans ; Keratomileusis, Laser In Situ* ; Prospective Studies ; Refractive Errors