Purpose To evaluate the effects of @entity5 complexity and technique on early and midterm oncologic efficacy and rate of complications for 100 consecutive biopsy-proved stage T1a @entity1358 ( @entity1358 ) treated with percutaneous microwave ablation. Materials and Methods This HIPAA-compliant, single-center retrospective study was approved by the institutional review board. The requirement to obtain informed consent was waived. Ninety-six consecutive patients (68 men, 28 women; mean age, 66 years    9.4) with 100 stage T1a N0M0 biopsy-proved @entity1358 (median diameter, 2.6 cm    0.8) underwent percutaneous microwave ablation between March 2011 and June 2015. Patient and procedural data were collected, including body mass index, comorbidities, @entity5 histologic characteristics and grade, RENAL nephrometry score, number of antennas, generator power, and duration of ablation. Technical success, local @entity5 progression, and presence of complications were assessed at immediate and follow-up imaging. The Kaplan-Meier method was used for survival analyses. Results Technical success was achieved for all 100 @entity5 (100%), including 47 moderately and five highly complex @entity1358 . Median clinical and imaging follow-up was 17 months (range, 0-48 months) and 15 months (range, 0-44 months), respectively. No change in estimated glomerular filtration rate was noted after the procedure (P = .49). There were three (3%) procedure-related complications and six (6%) delayed complications, all @entity6986 . One case of local @entity5 progression (1%) was identified 25 months after the procedure. Three-year local progression-free survival, cancer-specific survival, and overall survival were 88% (95% confidence interval: 0.52%, 0.97%), 100% (95% confidence interval: 1.0%, 1.0%), and 91% (95% confidence interval: 0.51%, 0.99%), respectively. Conclusion Percutaneous microwave ablation is an effective and safe treatment option for stage T1a @entity1358 , regardless of @entity5 complexity. Long-term follow-up is needed to establish durable oncologic efficacy and survival relative to competing ablation modalities and surgery. (  ) RSNA, 2017.

Effect of Tumor Complexity and Technique on Efficacy and Complications after Percutaneous Microwave Ablation of Stage T1a XXXX : A Single-Center, Retrospective Study.

@entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'tumors'] @entity1358 :: ('MESH:D002292', 'Disease') :: ['renal cell carcinomas', 'RCCs', 'RCC'] @entity6986 :: ('MESH:D053584', 'Disease') :: ['urinomas']
@entity1358 :: (MESH:D002292,Disease) :: ['Renal Cell Carcinoma']
