Twenty cases of hepatocelluar carcinoma were examined by selective celiac and superior mesentericarteriography. Obstruction of the main portal vein due to tumor thrombus was revealed in 7 cases and 3 of thesecases had carvenous transformation of the protal vein(CTPV). The authors intended in this study to evaluate CTPVgroup and non-CTPV group clinically and radiologically. The results obtained are as follows; 1. The duration ofillness was shorter in CTPV group than non-CTPV group. 2. There was no significant difference in tumor sizebetween two groups, and main portion of tumor was located in the right lobe in both groups. 3. Arterioportal shuntwas present in 2 of 4 cases in non-CTPV group, but was no present at all in CTPV group. 4. Hepatofugal collateralsof portal vein were developed in all but one in both groups. 5. There was no significant difference in bloodchemistry between two groups. 6. CTPV may play an important role maintain the hepatic blood flow.
Carcinoma, Hepatocellular ; Portal Vein ; Thrombosis

PURPOSE: To correlate histologic subtypes with MR signal intensity in meniagioma and to find etiologic factors responsible for the signal characteristics of T2WI. MATERIALS AND METHODS: We. reviewed MRIs and histopathologic studies in 35 cases of meningioma. MR signal intenisty was measured with respect to cerebral cortex(gray matter) as hypointense, isointense, or hyperintense. Pathologically, meningioma was classified into subtypes, acording to the new WHO classification of brain tumors. The degree of cellularity, collagen, and vascularity was graded from 1 to 3, and presence or absence of psammoma bodies, microcysts, micronecrosis and microhemorrhage was obeserved. Multiple linear regression analysis was done to find relationship between the pathologic findings and MR signal intensity of T2WI. RESULTS: Even in the same subtype, cellularity, collagen and vascularty of the tumor were different. T1WI was not useful in discriminating pathologic subtype because most tumors were isointense or hypointense to the cortex regardless of histologic type. Most tumors showed various signal intensity on T2WI, but T2WI were not useful, either. Exceptionally, all five cases of microcystic meningiomas were hyperintense on T2W1. In analysing the relationship between MR signal intensity and pathologic factor, increased collagen content produced decreased signal intensity(P<0.01) and the existence of microcyst resulted in high signal intensity(P<0.01). Cellularity, vascularity, microcalcification, micronecrosis and microhemorrhage had no relationship with signal intensity on T2WI. CONCLUSION: Except for the five microcystic meningiomas with hyperintenty on T2WI there was no relationship between MR signal intensity and subtype of meningiomas. Pathologic factors influencing T2 signal intensity were microcyst and collagen. Even in the same subtypes of meningiomas, the T2 signal intensity was different. This may be due to different ratio of microcyst and collagen.
Brain Neoplasms ; Classification ; Collagen ; Linear Models ; Magnetic Resonance Imaging* ; Meningioma*

Tomography has played an important role in diagnosis of facial bone fracture. Nowadays, it still acts as ainevitable process in decision of adequate treatment in patient with facial bone fracture. At the Department ofRadiology, Hanyang University Hospital, 74 patients who have facial bone fracture, were observed and analyzed withsimple skull films, mainly skull A-P, lateral and Water's view, after comparison with tomographic findings. Theresults were as follows; 1. Male was in 90.5% incidence. Most frequent age distribution was 21 to 40 years andmarked 62.2%. 2. Most frequent cause of trauma was traffic accident as 41 cases and the next one was fall down as13 cases. Other cause were blunt trauma such as first, stone, heavy metal etc. and explosion. 3. Clinical symptomsand physical signs were painful swelling, abrasion, ecchymosis and subconjuctival hemorrhage in almost allpatient. 4. Fracture distribution was 22 cases in simple fracure and 52 cases in complex fractures which were 26cases in Tripod fractures, 14 cases in Le Fort fractures and 12 cases in combined complex fractures. 5. Theradiologic findings on tomography were opacity of orbit of P.N.S. 87.8%, regional soft tissue swelling 85.1%,displacement of bony fragment 56.8%, abnormal linear density in orbit or P.N.S. 48.6%, bony fragment in orbit orP.N.S. 47.3% change of size of orbit of P.N.S. 40.5%, foreign body in orbit or P.N.S. 16.2%, and others 27.0%.These radiologic findings of simple fracture were less than those of complex fracture. 6. Radiologic findings offacial bone fracture on simple films were analyzed after comparison with tomograhs. Detectable possibility ofobvious fracture lines such as cortical disruption or separation was 67.6% on simple filsm. Detectable possibilityof other radiologic findings on simple films were displacement of bony fragment 86.7%, abnormal linear density inorbit or P.N.S. 88.6%, bony fragment in orbit or P.N.S. 71.4%, opacity of orbit or P.N.S. 90.8%, change of size ororbit or P.N.S. 96.4%, regional soft tissue swelling 96.2%, foreign boy in orbit or P.N.S.41.7%. Others such asabsence or deformity of infraorbital foramen, subcutaneous emphysema or intraorbital air 40.0%. Thereforetomography is inevitably taken to correct diagnosis of facial bone fracture.
Accidents, Traffic ; Age Distribution ; Congenital Abnormalities ; Diagnosis ; Ecchymosis ; Explosions ; Facial Bones ; Foreign Bodies ; Fractures, Bone ; Hemorrhage ; Humans ; Incidence ; Male ; Orbit ; Skull ; Subcutaneous Emphysema

Intracranial tuberculomas have been reported occasionally, especially in Asia, though much decreased in recentyears. Those lesions can be diagnosed more easily and acurately using CT than conventional method, including angiography. Authors analysed CT findings of 21 cases, confirmed as tuberculoma, at Hanyang University Hospital from May 1979 to June 1983. The resuslts were as follows; 1. Of all 21 cases, multiple lesions were seen in 14 cases (67%) and single in 7(33%). 2. Of all 21 cases, lesions located only at supratentorial were in 19 cases(90%) and remained 2(10%) had lesions at both supra and infratentorial area. And temporal and parietal lobes were common location (65%) of all lesions. 3. In precontrast scan, density of tuberculoma showed largely isodense (68%)and others were slight high (29%) and low(3%). 4. All lesions were enhanced showed as homogeneous nodular (68%),ring-shaped(29%) and target shaped(3%). 5. All rings were continuous and thickness was largely uniform(67%), anddensity of center of the ring was mainly low(67%). 6. Edema was seen in 58% of all lesions: comparing with thesize of tuberculoma, edema size was smaller in 50%, lager in 33% and almost the same in 17%.
Angiography ; Asia ; Edema ; Methods ; Parietal Lobe ; Tuberculoma ; Tuberculoma, Intracranial

Unilateral or, particularly, bilateral congenital agenesis of the internal carotid artery is a rare anomaly. We report an occurrence of the condition, arising bilaterally, and report the findings of magnetic resonance imaging and magnetic resonance angiography.
Carotid Artery, Internal* ; Magnetic Resonance Angiography ; Magnetic Resonance Imaging

A 31-year-old woman with surgically proven spinal extradural granulocytic sarcoma was examined with magnetic resonance (MR) imaging. This patient had no evidence of systemic leukemia. The signal intensities of the mass on T1-weighted and gradient echo images were higher than those of spinal cord, which were different from iso-intensity of cases reported by other authors.
Adult ; Female ; Humans ; Leukemia ; Magnetic Resonance Imaging* ; Sarcoma, Myeloid* ; Spinal Cord

It has been known tht alterations in blood pressure, heart rate and other systemic reactions can occure artereitroduction of contrast media into the vascular system. And the factors of these alterations are the suddenchanges of the circulating blood volume, hypertonicity of the injected contrast media and adverse reactions to thecontast media. This pospective study included evaluation so f the hemodynamic changes, adverse reactions and itsrelationship with ensitivity tesst and allergic history in 105 patients who had been performed angiocardiographyduring period of 1 year from oct. 1981 to Sept. 1982. The results were as follows; 1. 14 out of 105 patient showedminor reactions to contrast media such as nausea, vomiting, coughing, etc. There is no close relationship betweenadverse reaction and sensitivity test or previous allergic history. 2. In the group of right sidedangiocardiography, 47.6% of patient showed elevation of blood pressure after injection of contrast media. 38.1% ofpatient, however, showed lowered blood presssure. The changes of the pulse rate were quite similar to those ofblood pressure; increased in 47.7% and decreased in 40.9% of patient. 3. In the group of left sidedangiocardiography, 61.6% of patient showed eleveation of blood pressure immediately after injection of contrastmedia, and 17.5% of patient showed lowered blood pressure. 5 minutes after injection of contrast media, largegroup of patient showed normalized blood pressure, The pullse rate was also increased in the 66.3% of patient.
Blood Pressure ; Blood Volume ; Contrast Media ; Cough ; Heart Rate ; Hemodynamics ; Humans ; Nausea ; Prospective Studies ; Vomiting

Carbon monoxide (CO) is a kind of freq uent toxic gas around our living lives, for common use of briquet as fuel, and its pathologic effect has been known due to mainly hypoxia and direct cytotoxicity in some part to almost all organs, especially to the brain and heart. Some authors have reported pathologic and anatomic changes of the acute of posioning, although in a few cases, that bilaterally symmetrical lesions of the globus pallidus or cerebral white matter regarded as typical. After using computed tomography (CT), those findings have been discovered more easily and acurately. Authors analysed CT find ings of 32 cases, who had a history of acute CO posioning and performed CT at Hanyang University Hospital from May 1979 to June 1983. The results were as follows: 1. Of all 32 cases with CT scan, low density lesions were demonstrated in 28 cases (88%) and others were hemorrhagic and calcified in 2(6%), respectively. 2. AII lesions were seen as bilaterally symmetrical, exce pt 2 cases of hemorrhage and 1 of low density . 3. Of all 28 cases of the low densities, 15 cases(53.6%) were located in the globus pallidus, 10(35.7%) in the cerebral white matter and 3( 1 0.7%) in both of them. 4. Of all 13 cases of the low density lesions in the cerebral wh ite matter, common locations were in the frontal and parietal lobes (65.6%), and more in frontal (40.6%). 5. Of all 13 cases of low density lesions in the cerebral white matter, cases of involving all of the lobes were found in only 4. 6. All of 2 cases of the cal c ified lesions were seen at both sides of the globus pallidus, symmetrically. 7. All of 2 cases of the hemorrhage were seen at thalamus, ventricles and head of caudate nucleus, and these locations were different from those of the low densities or calcifications.
Anoxia ; Brain ; Carbon Monoxide Poisoning ; Carbon Monoxide ; Carbon ; Caudate Nucleus ; Globus Pallidus ; Head ; Heart ; Hemorrhage ; Parietal Lobe ; Thalamus ; Tomography, X-Ray Computed ; White Matter

The infradiaphragmatic type of Total Anomalous Pulmonary Venous Return(TAPVR) is a rare congenital cardiacanomaly which usually results in death during the period of early infancy. A two month-old baby boy with cyanosisand respiratory distress was suspected of having a TAPVR clinically and the two-dimensional echocardiographicfindings were compatible with the infradiaphragmetic type of TAPVR. The subsequent cardiac catheterization andcineangiogram revealed the common pulmonary vein connected with portal vein and inferior vena cava in theinfradiaphragmetic area with obvious obstruction. The surgery and the autopsy confiremd the preopeative diagnosis.Among infants presenting pulmonary venous congestion in the newborn period. TAPVR below the diaphragm shold be oneof the important diagnostic cosiderations.
Autopsy ; Cardiac Catheterization ; Cardiac Catheters ; Diaphragm ; Humans ; Hyperemia ; Infant ; Infant, Newborn ; Male ; Portal Vein ; Pulmonary Veins ; Scimitar Syndrome ; Vena Cava, Inferior

Renal hemangioma is a rare benign tumor which usually causes unexplained painless gross hematuria with clotsin the renal pelvis or ureter. It isgenerally venous origin but may be arterial or mixed venoarterial; it may becapillary but is generally cavernous type which has predilection of submucosal, papillary,and medullary locations.It is very important ot include renal hemangioma in the diffrential diagnosis in cases of unexplained grosshematuria with clots in order to save the renal parenchyme. And preoperative selective renal angiography can offerhelpful diagnostic informations and may be helpful to decide surgical procedure. A case of surgically proven renalhemangioma is reported with a brief review of the literatures.
Angiography ; Diagnosis ; Hemangioma ; Hemangioma, Cavernous ; Hematuria ; Kidney Pelvis ; Kidney ; Ureter