No abstract available.
Pneumoconiosis* ; Thorax*

We have observed that the companion shadow of the upper rib may be misinterpreted as a small pnemothorax or pleural plaque associated with asbestosis. To observe the radiographic characteristics of the normal companion shadow, we analyzed, on the posteroanterior(PA) chest radiographs, the companion shadow of 50 normal cases. Factors such as occurrence on each rib, the sharpness of the margin, the relative position to the rib, the shape and the thickness were observed. Also, we analyzed the displaced pleura of 4 pneumothorax cases to differentiate their frndings from the findings of normal companion shadows. On 50 normal chest radiographs, 192 compaion shadows were observed on the first to fourth ribs. In 173 of those shadows, the visceral margin of the companion shadow on the second rib simulated pneumothorax more closely than those on any othe rivs due to its apical location and thinness. In six of 50 normal cases, the companion shadow on the first or second rib showed an inw rdly convex lower margin, mimicking pleural plaque. The compaion shadow was suggested on the plain chest radiograph by the following characteristics imultiplicity(47/50), thicker than normal pleura(3/4), persistent on serial filma with the same shape and specific location(4/4).
Asbestosis ; Friends* ; Humans ; Pleura ; Pneumothorax ; Radiography, Thoracic ; Ribs* ; Thinness

Authors reviewed 21 cases of histologically confirmed rib tumor except metastasis and myeloma from Nov. 1973 to Dec. 1982 at Seoul National University Hospital. The resuls are as follows: 1. Major clinical findings are painand mass. 2. Pathologic diagnosis of rib tumors are 5 cases of fibrous dysplasia, 3 chondroma, 2 osteochondroma, 2desmoplastic fibroma, 3 chondroma, 2 osteochondroma, 2 desmoplastic fibroma, 5 osteosarcoma, 1 aneurysmal bonecyst, 1 eosinophilic granuloma, 1 cavernous hemangioma, 1 chondrosarcoma. 3. Radiologic findings are osteolyticchange and cortical expansion without marginal sclerosis in fibrous dysplasia, central location, well-definedosteolytic change with marginal sclerosis and no cortical destruction in desmoplastic fibroma, corticaldestruction, soft tissue mass and pleural effusion in malignant tumors.
Aneurysm ; Chondroma ; Chondrosarcoma ; Diagnosis ; Eosinophilic Granuloma ; Fibroma ; Fibroma, Desmoplastic ; Hemangioma, Cavernous ; Neoplasm Metastasis ; Osteochondroma ; Osteosarcoma ; Pleural Effusion ; Ribs ; Sclerosis ; Seoul

CT scans of 21 patients(intrathoracic goiter=7. Castleman disease=6, pulmonary carcinoid tumor=3, parathyroid adenoma=1, thyroid carcinoma=1, paraganglioma=1, benign pleural mesothelioma=1, sclerosing hemangioma=1) with mediastinal tumors that are known to be enhanced with intravenous injection of contrast media, were studied retrospectively to investigate the enhancing capabilities f those tumors and to describe their CT findings. The degree of enhancement was estimated by visual inspection with a grading system. All but one case of cystic parathyroid adenoma showed enhancement on post-contrast scan. The degree of enhancement was not helpful in differentiating these tumors. Characteristic location and pattern of tumor extension were found in cases of intrathoracic goiter, parathyroid adenoma, thyroid carcinoma and paraganglioma. Calcifications were found in intrathoracic goiter(5/7). Castleman disease(2/6). Pulmonary carcinoid(1/3), thyroid carcinoma. Necrotic low-attenuation areas were in intrathoracic goiter(7/7), parathyroid adenoma, thyroid carcinoma and paraganglioma. In conclusion, mediastinal tumors that are known to be enhanced in the literature were enhanced with rare exception, and if we consider the predilection site of those tumors, the scope of differential diagnosis can reasonably be narrowed.
Carcinoid Tumor ; Contrast Media ; Diagnosis, Differential ; Goiter, Substernal ; Injections, Intravenous ; Paraganglioma ; Parathyroid Neoplasms ; Retrospective Studies ; Thyroid Gland ; Thyroid Neoplasms ; Tomography, X-Ray Computed

No abstract available.
Child* ; Humans

No abstract available.
Humans ; Wilms Tumor*

BACKGROUND: This study aimed to investigate bradycardia as an adverse effect after administration of dexmedetomidine during 33degrees C target temperature management. METHODS: A retrospective study was conducted on patients who underwent 33degrees C target temperature management in the emergency department during a 49-month study period. We collected data including age, sex, weight, diagnosis, bradycardia occurrence, target temperature management duration, sedative drug, and several clinical and laboratory results. We conducted logistic regression for an analysis of factors associated with bradycardia. RESULTS: A total of 68 patients were selected. Among them, 39 (57.4%) showed bradycardia, and 56 (82.4%) were treated with dexmedetomidine. The odds ratio for bradycardia in the carbon monoxide poisoning group compared to the cardiac arrest group and in patients with higher body weight were 7.448 (95% confidence interval [CI] 1.834-30.244, p = 0.005) and 1.058 (95% CI 1.002-1.123, p = 0.044), respectively. In the bradycardia with dexmedetomidine group, the infusion rate of dexmedetomidine was 0.41 +/- 0.15 microg/kg/h. Decisions of charged doctor's were 1) slowing infusion rate and 2) stopping infusion or administering atropine for bradycardia. No cases required cardiac pacing or worsened to asystole. CONCLUSIONS: Despite the frequent occurrence of bradycardia after administration of dexmedetomidine during 33degrees C target temperature management, bradycardia was completely recovered after reducing infusion rate or stopping infusion. However, reducing the infusion rate of dexmedetomidine lower than the standard maintenance dose could be necessary to prevent bradycardia from developing in patients with higher body weight or carbon monoxide poisoning during 33degrees C targeted temperature management.
Atropine ; Body Weight ; Bradycardia* ; Carbon Monoxide Poisoning ; Dexmedetomidine* ; Diagnosis ; Emergency Service, Hospital ; Heart Arrest ; Humans ; Hypothermia, Induced ; Logistic Models ; Odds Ratio ; Retrospective Studies

No abstract available.
Dermatitis, Seborrheic* ; Humans

Thoracic disc herniation is an uncommon cause of thoracic cord compression. Herniation in this region is of particular importance because of the serious disorders of nervous function which result from anterior compresstion of the spinal cord. Early diagnosis and prompt surgical treatment are imperative because of the progressive and serious neurological deficit which results from delay. Numerous problems remain as to the safest surgical approach to the prolapsed thoracic intervertebral disc. We treated a case of herniated intervertebral disc occuring at Tll–T12 using the anterior approach. The result was favourable.
Early Diagnosis ; Intervertebral Disc ; Spinal Cord

Malignant lymphomas with cental and/or peripheral low densities suggesting internal infarcted necrosis arerare, probably due to the same reason as that of normal lymph nodes in which spontaneous infarction seldom occuresbecause of dual vascular connection and low oxygen consumption of activated lymphocytes. We report eight cases ofhistologically proven non-Hodgkin's lymphoma, that showed necrotic low density within tumor mass in CT scan, priorto any teatment. The locations of necrotic lymphomas were mediastinum in 3 cases, abdomen in 4 cases, and neck in1 case. The histologic types of the cases wre diffuse histiocytic (Rappaport) in 4 cases, porly differentiatedlymphocytic types in 2 cases, lymphoblastic type in 1 case, and mixed type(predominantly poorly differentiatedlymphocytic) in 1 case. It seems that malignant lymphoma can be included in differential diagnosis oflymphadenopathy with cental and/or peripheral necrotic low densities on CT.
Abdomen ; Diagnosis, Differential ; Infarction ; Lymph Nodes ; Lymphocytes ; Lymphoma ; Lymphoma, Non-Hodgkin ; Mediastinum ; Neck ; Necrosis ; Oxygen Consumption ; Tomography, X-Ray Computed