Pathological characteristics and radiographic correlates of XXXX .

@entity1 @entity8 @entity2558 @entity5 @entity3928 @entity1358 @entity703
OBJECTIVES: To characterize pathological and @entity5 -specific outcomes of surgically resected @entity703 and to identify clinical or radiographic features associated with these outcomes. METHODS AND MATERIALS: All @entity1 at our institution who underwent radical or partial nephrectomy for complex renal cystic masses between 2004 and 2011 with available computed tomographic imaging were included. The Bosniak score was determined, as were 10 specific radiographic characteristics of @entity8 in @entity1 with preoperative imaging available for review. These characteristics were correlated with @entity3928 histopathology. Recurrence-free survival after surgery was determined. RESULTS: Overall, 133 @entity1 underwent renal surgery for complex cystic lesions, 89 (67%) of whom had malignant lesions. Malignancy risk increased with Bosniak score (P <=0.01) and presence of mural nodules (P = 0.01). Most (63%) @entity5 demonstrated clear cell histology. The @entity1358 (25%) exhibited lower enhancement levels (P = 0.04) and were less often septated (P<0.01). Of the @entity5 , 79% were low stage ( @entity2558 ), and 73% were Fuhrman grade 1 or 2. Large cyst size was associated with advanced @entity5 stage (P = 0.05). Neither Bosniak score nor any other radiographic parameter was associated with Fuhrman grade. In 70 @entity1 with a median follow-up of 43 months, only 1 (1.4%) developed disease recurrence. CONCLUSIONS: Most @entity8 are low-stage, low-grade lesions. @entity1358 account for nearly a quarter of @entity8 and have unique radiographic characteristics. Disease recurrence after surgical resection is rare. These findings suggest an indolent behavior for @entity703 , and these lesions may be amenable to active surveillance.
