PURPOSE: The purpose of this study was to evaluate the plain chest radiological findings of silicosis based on ILO 1980 Classification. METHODS AND MATERIALS: Author studied the plain chest films of 200 patients with silicosis in Taebaek district and silicotic lesions were classified bascd on ILO 1980 Classification. There were 196 males and 4 females among them(mean age;56.2 years). The mean duration of dust cxposurc was 18.8 years. Small and large opacities were classified according to their profusion, size and shape, and size category, respectively. Other associated findings were also analyzed. RESULTS: Amont 200 patients there were 153 cases of small opacities and 47 cases of large opacities. Category 2/2(21.6%) and q/q type(22.9%) were most common for small opacities, according to their profusion, size and shape. Category B is most common for large opacities, according to their size. Incidence and size of large opacities increased with duration of dust exposure. Associated findings of hilar eggshell calcifications(5.5%), calcified silicotic nodules(3.5%), active pulmonary tuberculosis(10.5%) and pleural abnormality(9.0%) were domonstrated, too. CONCLUSION: Plain chest radiological findings of silicosis were fine irrcgular and/or round small opacities in Ifie early phasc, but if advanced, large opacities of progressive massive fibrosis and focal cmphysematous appcared in the upper lung fields. Hilar lymphadenopathy and eggshell calcifications, active pulmonary tuberculosis, pleural thickening and calcifications could be associated.
Classification* ; Dust ; Female ; Fibrosis ; Humans ; Incidence ; Lung ; Lymphatic Diseases ; Male ; Silicosis* ; Thorax* ; Tuberculosis, Pulmonary

This paper describes to design and to examine the mechanical characteristics of high frequency jet ventilator. The device consists of Phase lock loop (PLL) system, solenoid valve driving control part and Air regulating system. This study is carried out by changing several factors such as endotracheal tube (E.T. tube) diameter, injector cannula diameter, 1%, and frequency (breaths/min.) having direct effects on the gas exchange as well as parameters of the entrained gas by venturi effect, so as to measure the tidal volume and minute volume. This system characteristics were as follows: 1) Frequency: 6-594 bpm 2) Inspiration time: 1-99% 3) Variance of input air pressure: 1-30 PSI
Air Pressure ; Catheters ; Tidal Volume ; Ventilators, Mechanical*

No abstract available.
Fingers* ; Replantation*

Acquired digital fibrokeratomas are uncommon, benign, acquired, firm, more or less hyperkeratotic projections, arising most frequently from the fingers but rarely from the nail beds. We experienced a case of acquired digital fibrokeratoma arising from the nail bed of the left 4th toe in a 20-year-old female.
Female ; Fingers ; Humans ; Toes ; Young Adult

PURPOSE: The purposes of this study were to analyze the MR findings of medulloblastoma, and to evaluate the subarachnoid dissemination and the significance of contrast enhanced MR of brain and spine for tumor.. MATERIALS AND METHODS: The preoperative brain MR studies of 18 patients (9 males, 9 females;mean age, 9.4 years) with surgically proved medulloblastomas were retrospectively reviewed to characterize these neoplasms with regard to their location, size, MR signal intensity, appearance after contrast enhancement, presence of cyst and necrosis, subarachnoid dissemination, and other associated findings. In 14 patients postoperative spine MR studies were evaluated for staging and therapeutic planning. RESULTS: The most frequent location of medulloblastoma was the inferior vermis and the mean tumor size was 4.1 x 3.6 x 3.9 cm. On Tl-weighted image, medulloblastomas generally had low to intermediate signal, predominantly hypointense relative to white matter. On T2-weighted image, medulloblastomas showed modetately high signal, hyperintense relative to white matter. Inhomogeneous contrast enhancement was demonstrated in 13 patients(72.2%) after injection of gadopentetate dimeglumine(Gadolinium). Cyst and necrosis within the tumor were visualized in 15 patients(83.3%). Subarachnoid disseminations of medulloblastomas were noted in 11 patients(61.1%), of which 6 demonstrated intracranial and 2 intraspinal dissemination. Three had both intracranial and intraspinal dissemination. In nine cases with intracranial lesions, there were intraparenchymal mass formation(7), subarachnoid nodules(5), infundibular lesions(2) and diffuse gyral enhancement(I). In five cases with intraspinal lesions, there were extramedullary intradural small nodules(3), central canal nodules(2), intradural masses(I)and fine nodular and sheet-like leptomeningeal enhancement(1). Other associated findings included intratumoral hemorrhage(11.1%), per/tumoral edema(44.4%), tonsillar herniation(44.4%), hydrocephalus(88.9%) and calcification(44.4%). CONCLUSION: Medulloblastomas revealed low to intermediate signal intensity on Tl-weighted image and intermediate to moderately high signal intensity on T2-weighted image, relative to cerebellar white matter. Medulloblastomas were solid tumors with cystic necrosis, which showed inhomogeneous enhancement and subarachnoid disseminations to the intracranial and intraspinal spaces after Gd-DTPA enhancement. Gd-enhanced MR of brain and spine was an useful diagnostic modality in preoperative diagnosis and in staging of postoperative cases of medulloblastomas, which was superior to postcontrast CT or precontrast MR.
Brain* ; Diagnosis ; Gadolinium DTPA ; Humans ; Male ; Medulloblastoma ; Necrosis ; Retrospective Studies ; Spine*

We performed 70 proceudres of transarterial chemoembolization (TAE) through extrahepatic collateral vessels (n=27) or parasitic feeders (n=18) in 45 hepatocellular carcinoma patients. The collaterals developed after interruption of the hapatic artery due to repeated TAE(n=17), surgical ligation(n=7) and primary celiac occlusion (n=3). Radiologic findings suggesting the existence of parasitic or collateral supply for hepatocellular carcinoma were 1) a focal defect of Lipiodol retention on CT or plain film after TAE via the hepatic artery, 2) dilated and tortuous vessels around the mass on angiography, 3) persistent elevation of the level of serum alpha fetoprotein or continuous clinical symptoms in spite of sufficient devascularization of the tumor via the hepatic artery, and 4) radiological findings of direct invasion into adjacent organ. The sites of the catheter placement were the inferior phrenic artery (n=19), omental branches (n=16), periportal collaterals (n=6), pancreaticodenal arcade (n=3), gastroduodenal artery (n=3), internal mammary artery (n=2), intercostal artery (n=2), lateral thoracic artery (n=1), bronchial artery(n=1), and colic branches(n=1). Masses feeded by the inferior phrenic and chest wall collaterals were usually located at the dome area of the liver, and the omental and gastroduodenal collaterals developed in the masses located at the inferior tip of the liver. After TAE via collateral vessels, 37 patients underwent follow-up study. In 18 cases(48%), the tumor favorably responded to TAE. Specific complications of collateral TAE were epigastric soreness (n=10), severe shoulder pain (n=4), and embolization of the spinal artery during embolization through the intercostal artey (n=1). In conclusion, various extrahepatic collaterals are important alternative or additional routes for effective chemoembolization in patients with advanced hepatoma, and early recognition of the parasitic supply and the effort to perform TAE via collaterals is very important for effective management of the patients with the hepatoma.
alpha-Fetoproteins ; Angiography ; Arteries ; Carcinoma, Hepatocellular* ; Catheters ; Colic ; Ethiodized Oil ; Follow-Up Studies ; Hepatic Artery ; Humans ; Liver ; Mammary Arteries ; Shoulder Pain ; Thoracic Arteries ; Thoracic Wall

As a new interventional procedure for the control of variceal bleeding, a portosystemic shunt can be established with the installment of metallic stent through the transjugular approach. In order to evaluate the clinical usefulness of the procedure, transjugular intrahepatic portosystemic chunt procedure were performed in 5 patients with variceal bleeding due to liver cirrhosis. The metallic stents were mainly a self expandable Wallstent(Schneider, Switzerland). An 8 to 10 mm shunt was formed by the insertion of the stent and balloon dilatation after puncture of the proximal portal vein from the right or middle hepatic vein. The patency of the shunt was proven by portography after the procedure. The portal pressure measured in 3 patients before and after the procedure improved with decrease from 31 mmHg to 25 mmHg. The procedure failed in 1 patient due to preexsisting portal vein thrombosis. During the follow-up period from 1 month to 4 months, shunts were patent in all 4 patients. However, hepatic encephalopathy occured in one patient one week following the procedure. Though the follow-up period was not long enough for full evaluation. We found the transjugular intrahepatic portosystemic shunt was a safe and effective procedure for the control of variceal bleeding by lowering the portal pressure. For the appropriate application for this procedure, the optimal size of the shunt and optimal degree of the resultant decompression are yet to be determined in the future.
Decompression ; Dilatation ; Esophageal and Gastric Varices ; Follow-Up Studies ; Hepatic Encephalopathy ; Hepatic Veins ; Humans ; Liver Cirrhosis ; Portal Pressure ; Portal Vein ; Portasystemic Shunt, Surgical ; Portography ; Punctures ; Stents ; Venous Thrombosis

PURPOSE: To evaluate the accuracy of T2-weighted imaging and MR cholangiopancreatography using the single shot fast spin-echo technique for evaluating pancreaticobiliary disease. MATERIALS AND METHODS: B e t ween March and July 1997, axial and coronal T2-weighted images ( T E : 8 0 -2 00 msec) and MR cholangiopancreatograms(TE:800 -1 2 00 msec) were obtained in two ways [single slab (thickness:30 -50 mm) and multislice acquisition under chemical fat saturation] using SSFSE pulse sequencing in 131 cases of suspected pancreati-cobiliary disease. The accuracy of SSFSE MR imaging was assessed in 89 lesions of 74 patients [male,48; female,26; age range, 3 0 -86 (mean,59)years] confirmed surgicopathologically(50 lesions in 39 patients) and clinically (39 lesions in 35 patients). Two radiologists reviewed the MR images and diagnosis was determined by consensus. RESULTS: Correct diagnosis was confirmed in 84 of 89 lesions (94 %). Seven lesions were falsely interpreted, false positive and false negative results accounting for two and five cases, respective l y. Two pancreatic cancers were misdiagnosed as pancreatitis and a cancer of the proximal common bile duct(CBD) was interpreted as a distal CBD cancer. The sensitivity of SSFSE MR imaging for malignancy was 93 %. One CBD stone revealed by endoscopic retrograde cholangiopancreatography (ERCP) was not detected on MR images. In contrast, a stone in the CBD seen on MR images was not apparent on subsequent ERC P. Sensitivity and specificity for calculous disease were 96 % and 99.7 %, respective l y. A benign stricture of the ampulla of Vater was falsely interpreted as normal, and correct diagnosis was possible in two falsely diagnosed cases when MR images were rev i ewed retrospectively. CONCLUSION: The combination of T2-weighted and cholangiographic images using SSFSE is an accurate method for diagnosing pancreaticobiliary diseases.
Ampulla of Vater ; Bile ; Cholangiopancreatography, Endoscopic Retrograde ; Cholangiopancreatography, Magnetic Resonance* ; Consensus ; Constriction, Pathologic ; Diagnosis ; Humans ; Magnetic Resonance Imaging ; Pancreatic Neoplasms ; Pancreatitis ; Retrospective Studies ; Sensitivity and Specificity

No abstract available.
Urokinase-Type Plasminogen Activator*

We report a case of multiple cutaneous focal mucinosis in a 22 year-old male, who presented with multiple, asymptomatic, nodular lesions on the left upper trunk and left arm which had persisted for about one year. They were 2 to 17 mm in size, firm, yellowish, dome-shaped elevated, slightly movable papules or nodules which were distributed over the area of the left C3-7 and TI-3 sensory dermatomes. The histopathologic findings showed homogeneous mucinous material in the upper dermis. The material was confirmed to be hyaluronic add by, alcian blue stain. Some of the lesions showed improvement with intmlesional injection of triamcinolone acetonide. Such an entity, to the best of our knowledge, has not yet been reported.
Alcian Blue ; Arm ; Dermis ; Humans ; Male ; Mucinoses* ; Mucins ; Triamcinolone Acetonide