PURPOSE - To compare the metastatic pattern and outcome of clear cell RCC (ccRCC) and papillary RCC (pRCC), and to assess the impact of sarcomatoid transformation on the disease spread and prognosis.
MATERIALS AND METHODS - This IRB-approved, HIPAA-compliant retrospective study included 149 consecutive patients (108 men; mean age 58 years; range 25-86) with metastatic RCC (ccRCC = 116, pRCC = 33), identified from imaging database.