with comorbid renal dysfunction.
In a multicenter, retrospective study that included 229 patients with or without renal insufficiency being treated for metastatic renal cell carcinoma with pazopanib, no significant differences were found in the incidence of adverse events between groups. Similar results were demonstrated for both efficacy parameters, progression-free survival, and overall survival (P = .6), Cristina Masini, MD, of AUSL-IRCCS in Reggio Emilia, Italy, and colleagues reported in Clinical Genitourinary Cancer.
The researchers also determined that dose reductions occurred more often in patients with renal insufficiency, compared with those that were renal competent (52% vs. 36%; P = .04).
The majority of study participants received a starting dose of 800 mg daily of pazopanib, which was reduced to a minimum of 200 mg daily in 19% of participants from the renal impairment group, compared with less than 1% in the nonrenally impaired group.
“The similar efficacy and safety displayed by pazopanib in patients with poor renal function, compared with those with normal function may have a major relevance for therapy individualization in clinical practice,” the investigators concluded, adding that, because of the retrospective study design, further research is needed to fully establish any causal links between pazopanib and renal insufficiency.
The authors reported that editorial assistance was supported by Novartis. No other conflict of interests were reported
SOURCE: Masini C et al. Clin Genitourin Cancer. 2018 Oct 1. doi: 10.1016/j.clgc.2018.10.001.