Cabo-POLARIS : A Trial to Evaluate Cabozantinib Among Haemodialysied Patients

Among patients with renal cell carcinoma (RCC), 2.7 to 4.7 % of patients are at risk of progressing to dialysis or transplantation after partial and radical nephrectomy respectively. Of note, similar risk factors can be seen in both disease: RCC and renal impairment leading to dialysis. Currently, three types of systemic therapies (ST) are mainly used among patients with metastatic renal cell carcinoma (mRCC): anti-angiogenics (mostly tyrosine kinase inhibitors and bevacizumab), mTOR inhibitors and immune checkpoint inhibitor. ST prescription for patients undergoing HD may be more dangerous than in other patients. This is partially explained by the fact that several adverse events can be induced by both the ST and HD e.g. thromboembolic disease, or hypertension. Patients in HD are usually excluded from major clinical trials and available data concerning safety and activity of ST in this specific population are lacking. In most cases, drugs' label is driven by the eligibility criteria of large randomized phase 3 trials that exclude this type of patients. The main source of information for these patients comes from academic publications of patients' cases or small cohorts, but they are not included within the drug label. Moreover, no clear guidelines are given by savant societies regarding those patients. It is known that patients with HD are at high risk of specific adverse events that can sometimes overlap with the safety profile of anti-cancer drugs: thromboembolic complications, cardio-vascular comorbidities, hematologic and metabolic abnormalities. Having a dedicated clinical trial to this particular population would definitely help the community to improve the care of HD patients by getting prospective data in order to increase the level of evidence and therefore to optimize anticancer drug use in this specific population.