RESUMO
Regorafenib is a multi-target tyrosine kinase inhibitor that has been approved for the treatment of metastatic colorectal cancer, advanced hepatocellular carcinoma, and metastatic gastrointestinal stromal tumors (GIST). Severe hepatobiliary toxicity has been reported in patients with colorectal cancer treated with regorafenib, but not in those with GIST. Therefore, the aim of the present study was to investigate the incidence and clinical course of regorafenib-associated hepatic toxicity (HT) in patients with GIST in a real-world setting. Patients with metastatic GIST treated with regorafenib between September 2012 and May 2014 at three German tertiary care centers were followed up until August 2017. Patient records were retrospectively analyzed and descriptive statistics were employed. HT was defined as alterations in the serum values of aspartate aminotransferase, alanine aminotransferase, γ-glutamyltransferase, alkaline phosphatase and bilirubin (according to the Common Terminology Criteria for Adverse Events, version 4.0), and/or corresponding clinical signs. The time to clinical progression and the overall survival were calculated by Kaplan-Meier curves. Overall, 21 patients were treated with regorafenib and 5 (23.5%) of those heavily pretreated patients suffered from severe HT during regorafenib treatment. In 4 (80%) of these cases, regorafenib treatment was continued, optimizing individual treatment benefit. Clinical monitoring and adequate therapy management are crucial for ensuring continuation of regorafenib treatment in order to achieve an optimal clinical outcome.
RESUMO
Currently, about 50% of patients with metastatic renal cell carcinoma (mRCC) receive a second-line therapy. Therefore, the choice at each subsequent treatment line remains an important issue. In this retrospective study, we sought to identify pretreatment clinical parameters that could predict the likelihood of a patient receiving a second-line therapy. One hundred and sixty-one mRCC patients who received targeted therapy were evaluated. Descriptive statistics, Kaplan-Meier overall survival (OS), Cox regression, and binary logistic regression models were used for data analysis. Second-line therapy was given to 105 patients (65%). Patients with grade 1 tumor received second-line therapy more frequently than those with grade 2/3 tumors (P = 0.03). Only tumor grade was significantly different between patients receiving, or not receiving, second-line treatment. Median OS was significantly superior in patients receiving second-line therapy (32 versus 14 months; P = 0.007; hazard ratio [HR], 1.75; P = 0.008), patients with grade 1 tumors (130 versus 29 months in G2/3 tumors; HR, 3.85; P = 0.009), and in patients without early tumor progression (41 versus 11 months; HR, 5.04; 95% confidence interval [CI], 3.06-8.31; P < 0.001). In binary logistic regression, we identified early progression to be significantly associated with a higher probability of not receiving a second-line therapy (HR, 2.50; 95% CI, 1.01-6.21; P = 0.048). This study hypothesizes that pretreatment grade and early progression are predictive parameters for the selection of patients for second-line therapy.
RESUMO
BACKGROUND: Chemotherapy (CTX) with gemcitabine, oxaliplatin, and paclitaxel (GOP) has demonstrated efficacy with an overall response rate (ORR) of approximately 50% in patients with multiply relapsed or cisplatin-refractory germ cell cancer (GCC) or both within a phase II study. We analyzed the efficacy and safety of GOP in routine clinical practice within a registry of the German Testicular Cancer Study Group. METHODS: Overall, 63 patients with refractory GCC, who received GOP because of progression under cisplatin-based treatment or relapse after high-dose CTX, were included in this database. Patient characteristics, response rate, toxicity, progression-free and overall survival (OS) were analyzed. For further risk stratification, univariate and multivariate analyses were performed. RESULTS: GOP was applied as second to eighth treatment line (median fourth) after cisplatin-based CTX. The ORR was 44% with complete remissions achieved in 8 patients (4 patients with CTX plus additional residual tumor resections and 4 patients with CTX alone) and partial remissions achieved in 19 of all for best response evaluable patients. The median progression-free survival and OS were 4.0 months (95% CI: 3.08-4.94) and 13.3 months (95% CI: 9.50-17.06), respectively. Long-term OS of>2 years was achieved in 13 (21%), and grade III and IV toxicities, mainly thrombocytopenia and leukopenia, occurred in 29 patients. CONCLUSION: Our results were similar compared with the previous results from the phase II study with a distinct activity with an ORR of 44%, and a long-term OS in 21% of the patients. Our data support the recommendation to use GOP ± secondary surgery in patients with multiply refractory metastatic GCC.
