[en] Uterine metastasis from stomach carcinoma occurred in a patient who five years previous had undergone gastrectomy for gastric adenocarcinoma. CT scans showed an ill-defined lobulated low density mass in the center of the uterus. T1-weighted MRI imaging showed that the lesion was indistinct from the myometrium; on T2-weighted imaging it showed increased signal intensity and had infiltrated the myometrium. After Gd-DTPA administration, the lesion showed very little enhancement. (author). 5 refs., 1 tab., 2 figs

[en] Launched in 1964, the Journal of the Korean Society of Radiology (JKSR) has served as the official journal of the Korean Society of Radiology (KSR). However, with establishment of the Korean Journal of Radiology (KJR), an entirely English journal, in 2000 and listing of the KJR in the SCI(E), KJR has become the representative academic journal of the KSR. Therefore, the identity of JKSR needs to be restructured, and a questionnaire survey was conducted to investigate the status and the future direction of the JKSR. The survey was conducted in September 2018 with 10 questions through on-line and mobile, and 553 members gave responses. According to the survey results, about 75% of the respondents read more than one JKSR article a year, mostly through on-line. All types of papers, including original article, case report, and review article were being read. The most common reason for contributing articles to the JKSR was submission for the radiology board examination, and the most common reason for not contributing articles to the JKSR was non-recognition of the publication in JKSR as achievement in universities because JKSR is not indexed in SCI(E). Many respondents were hoping for dealing with continuous medical education and health policies in radiology as the future role of JKSR. Based on these surveys, we plan to reorganize JKSR in 2019, which we would like to introduce in this paper

[en] To analyze the potential of MR to distinguish lung cancer from progressive massive fibrosis (PMF) in patients with coal worker's pneumoconiosis. The study consisted of 9 patients with pathologically proven lung cancer and 26 PMFs in 17 patients. All the patients had radiologic evidence of pneumoconiosis. T1-weighted FLASH images were obtained before and 0.5, 1, 2, 3, 4, 5, 7.5, 10, 12.5, and 15 minutes after injection of Gd-DTPA. T2-weighted fast spin-echo images were obtained. The imaging findings were evaluated for enhancement time curve, contrast uptake equivalent (CE), and enhancement factor (EF). On T1WI, there was no significant signal intensity difference between lung cancer and PMF. On T2WI, all lung cancer showed high signal intensity, as opposed to all PMFs which showed low signal intensity except for one PMF. Only one PMF showed high signal intensity on T2WI. For the dynamic contrast study, lung cancer showed faster and slightly stronger enhancement than PMFs. For a delayed image, most of the lung cancers (78%) showed washout, as opposed to a plateau in most of PMFs (73%) (p=0.0153). However, no difference was detected between the EFmax of lung cancer and PMFs (p=0.349). MR is potentially a useful tool in distinguishing lung cancer from PMFs in patients with coal worker's pneumoconiosis

[en] We describe a case of mesenchymal chondrosarcoma arising from the periosteum of the rib. On chest radiograph the mass showed well-defined radiopacity, and there was rib erosion. On CT, there was marked enhancement with irregular ossification and rib erosion, while a ^99mTc-MDP scan revealed dense radionuclide uptake. =20

[en] Emphysematous cholecystitis is an uncommon condition which may mimic acute cholecystitis. But it differs from acute cholecystitis in its relatively greater frequency in men and diabetics and has graver prognosis. The condition is diagnosed by demonstration of air in lumen, wall of gallbladder and/or pericholecystic space using a variety of radiographic techniques: simple abdominal radiography, ultrasonography and CT scanning. One illustrative case is presented herein and the pertinent literature is reviewed

[en] Emphysematous pyelonephritis is a rare, life threatening infection of kidney and the perinephric space, characterized by the production of gas within the renal parenchyma. The aim of this study is to analyze the clinical and radiologic characteristics of emphysematous pyelonephritis. We reviewed 7 cases of the emphysematous pyelonephritis. Six patients had plain abdominal radiographs, ultrasonograms and abdominal CT scans. Only one patient had plain radiograph and ultrasonogram. In 5 operated cases, CT findings were compared with surgical records. Plain radiographs showed characteristic diffuse mottling of gas in renal fossa. On sonogram, intrarenal gas was identified as echogenic foci with dirty shadows. CT scan showed inflammatory mass with gas and fluid levels in adjacent to the kidney. CT findings corresponded relatively wall with the surgical findings in regard to disease extent. Intrarenal gas in appropriate clinical setting is highly specific for emphysematous pyelonephritis. CT is the most sensitive method for demonstrating the disease extent as well as specific diagnosis

[en] The purpose of this report is to describe the high-resolution computed tomography (HRCT) findings of the lung in survivors of acute respiratory distress syndrome (ARDS). Among eleven patients who survived ARDS for one year, chest radiography and HRCT revealed pulmonary fibrosis in four. Causes of ARDS included pneumonia during pregnancy, near drowning, pneumonia during liver cirrhosis, and postoperative sepsis. Thoracoscopic biopsy and histopathologic correlation were available in one patient. HRCT showed diffuse interlobular septal thickening, ground glass opacity, parenchymal distortion, and traction bronchiectasis. Fuzzy centrilobular nodules were seen in two patients and one patient had multiple, large bullae in the left hemithorax. In all patients, lesions affected the upper and anterior zones of the lung more prominently. The distribution of pulmonary fibrosis was characteristic and reflected the pathogenesis of lung injury; fibrosis was largely due to hyperoxia caused by ventilator care. In one patient, histopathologic correlation showed that imaging findings were accounted for by thickening of the alveolar septum along with infiltration of chronic inflammatory cells and fibrosis. Fuzzy centrilobular nodules corresponded with bronchiolitis

[en] To evaluate the usefulness of CT features of appendiceal mucocele in the diagnosis and evaluation of complications. We retrospectively reviewed CT findings and compared with operative findings in 7 cases of pathologically proven appendiceal mucocele. CT findings such as location and extent of the lesion, tissue density, thickness or calcification of the wall, presence of adjacent inflammatory infiltration, and visualization of normal vermiform appendix were analyzed. Appendiceal mucocele was found as homogeneous low density cystic mass adjacent to the cecum, which has no surrounding inflammatory infiltration except in one case of perforation and one case of intussusception. Mean CT number measured in 4 cases was 21 Hounsfield unit. Thin curvilinear calcifications were noted along the cystic wall in 2 cases. Normal vermiform appendix couldn't be demonstrated in all cases. Appendiceal mucocele is characterized by homogeneously low density and thin walled cystic tumor adjacent to cecum without surrounding inflammatory infiltration, and absence of normal vermiform appendix on CT. Therefore, CT is valuable in preventing operative complications of appendiceal mucocele

[en] We present a case of pulmonary vein (PV) stenosis after radio-frequency (RF) ablation, in which a hemodynamic change in the pulmonary artery was similar to that of congenital PV atresia on time-resolved contrast-enhanced magnetic resonance angiography (TR-MRA). A 48-year-old man underwent RF ablation due to atrial fibrillation. The patient subsequently complained of hemoptysis, dyspnea on exertion, and right chest pain. Right PV stenosis after catheter ablation was diagnosed through chest computed tomography and lung perfusion scan. Pulmonary TR-MRA revealed the pulmonary artery via systemic arterial collaterals and draining systemic collateral veins. On a velocity-encoded cine image, the flow direction of the right pulmonary artery was reversed in the diastolic phase and the left pulmonary artery demonstrated continuous forward flow throughout the cardiac cycle. These hemodynamic changes were similar to those seen in congenital unilateral PV atresia.

[en] Malignant transformation of teratoma in the anterior mediastinum is rare; the mass usually has a long history and is seen in older patients. We report a case of teratoma with malignant transformation in the anterior mediastinum, complicated by rupture. CT revealed a lobulated, inhomogeneous cystic mass with a fat component and wall calcifications. The lateral wall was disrupted and consolidation in the adjacent left upper lobe was noted, suggesting rupture. A heterogeneously enhanced solid portion, obliterating the fat plane between the mass and the great vessels was present in the medial aspect of the mass, and pathologic examination demonstrated the presence of adenocarcinoma