CT and MRI imaging features and long-term follow-up of adult XXXX .

@entity3969 @entity1 @entity5 @entity548
BACKGROUND: Only few previous case reports have been found focusing on the imaging findings of adult @entity3969 ( @entity3969 ). PURPOSE: To characterize multislice computed tomography (MSCT), magnetic resonance imaging (MRI) characteristics, and follow-up results of adult @entity3969 . MATERIAL AND METHODS: Sixteen @entity1 with @entity3969 were studied retrospectively. MSCT and MRI were undertaken to investigate the @entity5 characteristics. RESULTS: @entity5 (mean diameter, 13.1        4.5   cm) exhibited an expansible appearance and disrupted the reniform contour (16/16), cystic components (16/16), curvilinear calcification (1/16), poorly marginated (2/16), @entity548 (16/16), displacement of renal pelvis or calyx (13/16), and had lymph node or distal metastases (5/16). Attenuation of @entity3969 was less or equal compared to renal parenchyma on unenhanced CT (P   >   0.05), while @entity5 enhancement after administration of a contrast agent was lower than that of normal renal parenchyma (P   <   0.05). @entity3969 was isointense on T1-weighted (T1W) imaging, isointense or hypointense on T2-weighted (T2W) imaging. @entity5 enhancement was less than normal renal cortex in all phases (P   <   0.05). The number of @entity5 stages (grades I, II, III, and IV) was two, three, six, and five cases, respectively. Follow-up time was in the range of 19-123 months; six @entity1 died within 3 years, six @entity1 died within 5 years after the initial diagnosis, with the remaining @entity1 still alive. CONCLUSION: Adult @entity3969 tends to be a large @entity5 , isointense or hypointense on T2W imaging with enhancement less than normal renal parenchyma in all phases. The long-term follow-up results demonstrated the poor prognosis of the @entity5 .
