Radiation medicine
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To prevent micrometastasis at an earlier stage and to increase the lateral or circumferential tumor free margins, there is a rationale for neo-adjuvant chemo-radiotherapy in patients with colorectal cancer. In order to investigate the effects of such a protocol on colonic anastomotic healing, an experimental study resembling the clinical use of neo-adjuvant concomitant 5-FU+ irradiation treatment of colorectal cancer was conducted. ⋯ Preoperative pelvic fractionated irradiation and concomitant 5-FU delays anastomotic healing.
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A 48-year-old woman presented with sudden left hemiplegia with headache, which deteriorated two days later. CT scan showed repeated intratumoral and subdural hemorrhages. Magnetic resonance imaging showed a parasagittal tumor infiltrating into the superior sagittal sinus, with intratumoral hemorrhage and acute subdural hematoma in the interhemispheric fissure. ⋯ The histological diagnosis was fibrous-type meningioma with a high Ki-67 labeling index (6.7). As there were tumor cells within the subdural hematoma, it seemed to have resulted from tumoral hemorrhage. A high index of cell proliferation may indicate some mechanism responsible for hemorrhage in malignant tumor.
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Comparative Study
Detection of brain metastasis: comparison of Turbo-FLAIR imaging, T2-weighted imaging and double-dose gadolinium-enhanced MR imaging.
The purpose of this study was to compare Turbo-FLAIR imaging, T2-weighted imaging, and double-dose gadolinium-enhanced MR imaging in the detection of brain metastasis. Using the three sequences, 20 consecutive patients with brain metastases were prospectively studied with a 1.5-Tesla system. Three independent, blinded readers assessed the images for the presence, size, number, and location of metastatic lesions. ⋯ There was no difference between Turbo-FLAIR imaging and gadolinium-enhanced imaging in the accuracy of detecting solitary brain metastasis (4/4, 100%). In conclusion, Turbo-FLAIR imaging is a useful, noninvasive screening modality for brain metastasis. Its use may lead to cost savings in the diagnosis of brain metastases and may impact positively the cost-effectiveness of treatment.
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We report a case of summer-type hypersensitivity pneumonitis that demonstrated air-trapping. In this case we used images at inspiratory and expiratory volumetric HRCT, which enabled us to obtain images of the same level at inspiratory and expiratory CT.
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Case Reports
Anomalous systemic arterial supply to the basal segment of the left lung: demonstration using MR angiography.
In a 41-year-old man with an abnormal left lower lobe opacity on a chest radiograph, magnetic resonance (MR) angiography showed a large abnormal vessel extending from the left side of the descending thoracic aorta, supplying the left lower lobe. Furthermore, the lung parenchyma showed no evidence of sequestrated lung. This entity corresponded to type-I of intralobar pulmonary sequestration, as classified by Pryce.