ABSTRACT
Objective To investigate the CT appearances of atypical renal angiomyolipoma to raise the CT diagnosing level and search for the differential points from renal angiomyolipoma. Methods Twenty-one patients with atypical renal angiomyolipoma and 24 patients with renal carcinoma underwent CT scan and enhanced scanning. Results CT results showed hyperintense in 12 of all 21 lesions of atypical renal angiomyolipoma,with iso-intensity in 6,hypointense in 3,and levering-cortex-up sign in 9 cases. The tumor body showed homogeneous enhancement on CT enhanced scanning and prolonged enhancement was noted in 7 cases. CT showed hyperintense in 3 of all 24 lesions of renal carcinoma,with mixed intensity in 5,hypointensity in 16,calcification in 2 cases. The majority of the tumor body showed heterogeneous enhancement on CT enhanced scanning with cortical hyperintensity and medullary low-intensity,and with contrast appeared fast wash-in and wash-out. Of all cases,8 presented with pseudo-capsule,7 with tumor embolus formation in the renal vein and inferior vena,10 with retroperitoneal lymphadenectasis,and 3 with intrahepatic metastasis. Conclusion CT scanning proves to play critical role in differentiating the atypical renal angiomyolipoma from renal carcinoma.
ABSTRACT
Objective To determine the CT features of the 16 - slice Spiral CT (MSCT) for aortic dissection (AD). Methods 16 - slice spiral CT were porformed in 25 patients of aortic dissection. All of patients were performed with unenhanced, contrast - enhanced scanning and three - dimensional reconstruction. Results 10 patients were normal on unenhanced and 15 patients were seen enlargred diameter of aorta. Intimal calcification and intimal displacement was seen in 8 cases and outer wall calcification was presented in 7 cases. After contrast - enhanced scanning, true and false lumen and intimal flap of AD could be shown in all of 25 cases (100%). The entry tears was revealed in 22 cases (88.9%). Beak sign was presented in all cases, but it was seen in the false lumen. The larger lumen was the false lumen in 88.5% of the cases. Intraluminal thrombus was presented in 12 cases. Conclusion Multislice spiral CT angiography is a safe,no - traumation,fast and accurate examination method. It can fully display theintimal flap,the true and false lumen and tear entrance, as well as the branches involved details and is therefore of important value for the diagnosis of aortic dissection.