Objective To correlate findings of chest radiograph with those of CT scan in aortic dissection. Method We retrospectively analyzed findings of chest radiograph and CT scan of 10 aortic dissection patients(for men and six women ; aged 51-79 years old(mean 64 years)) and correlate findings of chest radiograph with those of CT scan. Results Chest radiograph showed abnormal findings in nine cases(90%) with widening of wuperior mediastinum in nine(90%), disparity in size of ascending and descending aorta in four (40%), change in aortic configuration between successive examination in three (30%), bilateral pleural effusion in one(10%), and cardiomegaly in five(50%). CT scan showed atherosclerotic effusion in two(20%), pericardial effusion in one(10%), and mediastinal hematoma in two(20%). All patients with widening of superior mediastinum on chest radiograph showed aneurysm of ascending aorta and/or aortic arch on CT scan. Conclusion Chest radiograph is usually abnormal and the most common finding is wdening of superior mediastinum caused by aneurysm of ascending aorta and/or aortic arch. But normal chest radiograph may be observed in aortic dissection with mild degree aneurysm
The halo sign in a pulmonary nodule refers to the condition in which soft tissue attenuation of a pulmonary nodule is surrounded by peripheral ground glass attenuation on high resolution CT. The halo sign can be caused by several pathologic processes: hemorrhagic pulmonary nodules, tumor cell infiltration, and nonhemorrhagic inflammatory lesions. Hemorrhagic pulmonary nodules may occur in infectious diseases including invasive pulmonary aspergillosis, mucormycosis, and candidiasis and noninfectious diseases including Wegener granulomatosis and primary and metastatic hemorrhagic tumors. Tumor cell infiltration in bronchioloalveolar carcinoma, pulmonary lymphoma, and pulmonary metastatic neoplasm may appear with the halo sign. Eosinophilic lung disease and organizing pneumonia are representative of inflammatory lesions showing the sign.
Ultrasound has been found to be accurate, reliable and comfortable method in the measurement of spleen. Also ultrasound offers the rapid and simple method of estimating volume of spleen in vivo against the computed tomography.The study was undertaken to obtain standard values of size in three dimensions and normal range of splenic volume by the use of splenic volumetric index(SVI) in normal korean adults.The author analyzed 100 cases of abdominal ultrasonography of normal korean adults.The results were as fallows :1) The average size of spleen in adult male was 6.85±1.31cm in breadth, 4.93±1.27cm in thickness, 6.33±1.46cm in height ; in adult fermales, 6.61±1.23cm, 5.17±1.25cm, 6.33±1.42cm respectively ; total average, 6.73±1.27cm, 5.05±1.27cm, 6.33±1.39cm, respectively.2) The average splenic volumetric index in adult male was 8.20±3.95 : in adult females, 8.41±4.08 : total average, 8.31±4.00 : upper limit, 20.65 : lower limit 2.24.3) There were no statistical differences of SVI and size between sex and age.
The VX-2 Carcinoma was used to create a model of the orbital metastasis in rabbits.0.5ml suspension containing 20-30×107 cells of VX-2 Carcinoma was injected into the 36 orbits of 18 rabbits. With 3 to 4 day interval. tumors were evaluated with ultrasonography and carotid arteriography.Ultrasonography findings revealed a well-defined. hyperechoic mass with central necrosis. and invasion of the orbital wall and the optic canal. The tumors appeared hypervascular lesion with carly venous drainage and vascular sweeping on carotid arteriography.Pathologically, the tumor consisted of compacted high mitotic adenocarcinoma. with large vacuolated nuclei and profuse cytoplasm. Massive infiltration into the orbital wall and the retrobulba also found.This animal model quickly. consistently and inexpensively produced orbital mass lesions. It is well suited for ophthalmologic oncologic research focused imaging modalities. and multimodality of treatment approach to the orbital mass lesion.
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