Treatment Decisions for Metastatic Clear Cell Renal Cell Carcinoma in Older Patients: The Role of TKIs and Immune Checkpoint Inhibitors.

Given the underrepresentation of older patients in registration trials for metastatic renal cell carcinoma (mRCC), data to support the use of any particular systemic therapy over others, based on age, is limited. This is further complicated by clinical trials not commonly reporting adverse events by age. Thus, recommendations on treatment of older patients with mRCC are generally extrapolated from data on younger patients enrolled in these trials, which may not be ideal as many older patients are frail, have age-related organ dysfunction, or have multiple medical co-morbidities. In the last decade, the treatment landscape for mRCC has drastically changed with the approval of more than ten targeted therapies, as well as immune checkpoint inhibitors. Thus, treatment selection and sequencing of treatments can be especially challenging for clinicians. We begin this review by analyzing the available efficacy and toxicity data of these treatments in younger and older patients. We also discuss a network meta-analysis that compares the efficacy of these agents in older patients with mRCC. Utilizing this data, we suggest that nivolumab plus ipilimumab and cabozantinib may be favored for first-line treatment of specific populations of older patients. For salvage treatment, we suggest that cabozantinib may be the preferred agent for older patients.