Purpose: To find differential diagnostic imaging findings of mediastinal cystic lesions in chest computed tomography.
Materials and Methods:We retrospectively reviewed imaging findings of 70 patients with histopathologically proven mediastinal cystic lesions. They were 33 male and 37 female patients. Results: Among 70 cases, 49 cases were in the anterior mediastinum, 12 cases were in the middle mediastinum, and 9 cases were in the posterior mediastinum. 19 patients had symptoms. Chest discomfort was the most common symptom. When the cystic lesion was located in the anterior mediastinum, and unilocular, the possibility of thymic cyst was the most likely (p < 0.0027). When the cystic lesion was located in the anterior mediastinum and was multilocular with a relatively thick wall, the possibility of a mature cystic teratoma was the most likely (p < 0.001). When the lesion was a high attenuation cystic lesion located around the air-way, the possibility of a bronchogenic cyst was the most likely (p < 0.001). Conclusion: Chest CT gives information about the location, loculation, wall thickness and internal attenuation of mediastinal cystic lesions. And certain details seen on CT imaging can help with the correct diagnosis, especially in the cases of thymic cyst, mature cystic teratoma and bronchogenic cyst.
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submit.radiology.or.kr J Korean Soc Radiol 2011;65(4):337-344thrombolysis. Among them, catheter-directed thrombolysis is an attractive method, because it can potentially help achieve restoration of the lumen and removal of the thrombus lining Purpose: To evaluate the venous patency in patients treated by catheter-directed thrombolysis with low-dose urokinase (UK) for symptomatic lower extremity deep venous thrombosis (DVT). Materials and Methods: Eighty-nine consecutive patients (46 women and 43 men; mean age, 58.1 years), treated by catheter-directed thrombolysis with lowdose UK were included in this study. Immediate venous patency was evaluated in terms of technical success (successful restoration of antegrade in-line flow in the treated vein with residual stenosis rate of less than 30%) and clinical success (significant reduction of clinical symptoms before hospital discharge). Late venous patency was evaluated in terms of primary patency rate and clinical success. Results: Immediate technical success was achieved in all patients and immediate clinical success in 80 (90%) patients. There was no major systemic bleeding complication. The primary patency rate at 6 months and 12 months was 84% and 79%, respectively. Fifty-six (63%) patients were asymptomatic after a median clinical follow-up of 18 months, eleven (12%) patients improved moderately, seven (8%) patients remained unchanged, and fifteen (17%) patients had no clinical follow-up. Conclusion: Short-term catheter-directed thrombolysis with low-dose UK can be an effective, safe method to manage DVT of the lower extremities.
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