Avoidance of futile treatment and adverse events by using angiogenesis-specific imaging for early detection of disease progression in patients with first-line metastatic renal cell carcinoma.

134 Background: Although sunitinib is effective first-line therapy (1LT) for metastatic renal cell carcinoma (mRCC), ~20% of patients experience rapid progressive disease (PD). Traditional RECIST monitoring often does not detect PD until 90 days after 1LT initiation. Investigational angiogenesis-specific imaging (AI) may identify PD as early as 14 days post-1LT initiation, thus allowing a switch to a potentially more effective second-line therapy and avoiding unnecessary risk of AEs. This study’s goal was to quantify the potential reduction in futile 1LT length, AEs, and costs by using AI for early detection of PD. Methods: Decision modeling with a 90-day horizon evaluated a comparator arm using RECIST monitoring at 90 days and an intervention arm using AI at 14 days. Sunitinib costs were $21,250 for the comparator arm and $13,282 for the intervention arm. RECIST costs were $619 and AI costs were tested as a breakeven analysis. A literature review quantified AE rates associated with 1LT sunitinib and clai...