Pulmonary embolism is incidentally diagnosed in up to 5% of patients with cancer on routine imaging scans. The clinical relevance and optimal therapy for incidental pulmonary embolism, particularly distal clots, is unclear. The aim of the current study was to assess current treatment strategies and the long-term clinical outcomes of incidentally detected pulmonary embolism in patients with cancer.We conducted an international, prospective, observational cohort study between October 22, 2012, and December 31, 2017. Unselected adults with active cancer and a recent diagnosis of incidental pulmonary embolism were eligible. Outcomes were recurrent venous thromboembolism, major bleeding, and all-cause mortality during 12 months of follow-up. Outcome events were centrally adjudicated.A total of 695 patients were included. Mean age was 66 years and 58% of patients were male. Most frequent cancer types were colorectal (21%) and lung cancer (15%). Anticoagulant therapy was initiated in 675 patients (97%), of whom 600 (89%) were treated with low-molecular-weight heparin. Recurrent venous thromboembolism occurred in 41 patients (12-month cumulative incidence, 6.0%; 95% CI, 4.4% to 8.1%), major bleeding in 39 patients (12-month cumulative incidence, 5.7%; 95% CI, 4.1% to 7.7%), and 283 patients died (12-month cumulative incidence, 43%; 95% CI, 39% to 46%). The 12-month incidence of recurrent venous thromboembolism was 6.4% in those with subsegmental pulmonary embolism compared with 6.0% in those with more proximal pulmonary embolism (subdistribution hazard ratio, 1.1; 95% CI, 0.37 to 2.9; P = .93).In patients with cancer with incidental pulmonary embolism, risk of recurrent venous thromboembolism is significant despite anticoagulant treatment. Patients with subsegmental pulmonary embolism seemed to have a risk of recurrent venous thromboembolism comparable to that of patients with more proximal clots.
682 Background: Prognostic and predictive factors are becoming more important in mCRC patients, and may have an impact in overall survival and in the number of lines of chemotherapy that a patient can receive. Methods: We conducted a retrospective analysis of 334 patients with mCRC. We analyzed the clinical characteristics of 113 (33.8%) mCRC patients who received ≥3 lines of chemotherapy. We apply the statistical test Chi square in order to identify significant association. Results: Several characteristics were significantly associated with receiving ≥ 3 lines of chemotherapy (n = 113): age < 80 years (n = 93, OR = 3.07, p = 0.001), ECOG 0-1 (n = 98, OR = 3.21, p = 0.055), primary tumor resection (n = 62, OR = 2.36, p = 0.000) and resection of metastases (n = 56, OR = 2.07, p = 0.002). Partial or complete response rate in the first line of chemotherapy was also significantly associated with receiving ≥ 3 lines of treatment (n = 65, p = 0.011). Tumor mutational status was analyzed in 333 patients: KRAS mutation was detected in 163 over 333 patients genotyped (48.9%), NRAS in 25/206 (12.1%), BRAF in 15/217 (6.9%) and PI3K in 31/213 (14.5%). In the group of patients receiving ≥ 3 lines of chemotherapy (n = 113): KRAS mutation was found in 60/113 patients (53.1%), NRAS in 5/77 (6.5 %), BRAF in 5/84 (5.9%) and PI3K in 8/80 (11.1%). Tumor mutations were not significantly associated with ≥ 3 lines of chemotherapy. No significant association was found between sex, tumor location (right [n = 33, 29.2%] or left [n = 76, 73%]), liver or lung isolated metastases and 3 or later lines of chemotherapy. We also performed in our database a survival analysis in the 334 patients: those who received ≥3 lines of chemotherapy had significantly higher survival rates (median OS 18 m in the group of < 3 lines of treatment vs. 37.2 m in the group of ≥ 3 lines of chemotherapy, HR = 1,6; CI 95% 1,2-2.1; p < 0,001). Conclusions: This retrospective analysis showed that mCRC patients with < 80 years, ECOG 0-1, primary tumor and or metastases resected and those with complete or partial response in the first line of treatment have a higher probability of receiving ≥ 3 lines of chemotherapy. [Table: see text]
Background In patients with acute venous thromboembolism (VTE), the rates of recurrence and major bleeding are highest during the first weeks of anticoagulation. The CARAVAGGIO trial demonstrated noninferiority of apixaban to dalteparin for treatment of cancer-associated VTE without an increased risk of major bleeding. We compared the early time course of VTE recurrence and major bleeding events of apixaban compared with dalteparin at 7, 30, and 90 days of treatment in patients with cancer-associated VTE. Methods The study design of the CARAVAGGIO trial has been described. Eligible patients were randomly assigned to receive monotherapy with either apixaban or dalteparin for 6 months. The primary efficacy outcome was the incidence of objectively confirmed recurrent VTE. The primary safety outcome was major bleeding. Results In 1,155 patients, recurrent VTE after 7, 30, and 90 days occurred in 6 (1%), 15 (2.6%), and 27 (4.7%) patients in the apixaban arm versus 5 (0.9%), 20 (3.5%), and 36 (6.2%) patients respectively in the dalteparin arm. By day 7, 30, and 90, major bleeding events had occurred in 3 (0.5%), 9 (1.6%), and 16 (2.8%) patients in the apixaban group versus 5 (0.9%), 11 (1.9%), and 17 (2.9%) patients in the dalteparin group. Conclusion The frequencies of recurrent VTE and major bleeding events at 7, 30, and 90 days of apixaban compared with dalteparin were similar in patients with cancer-associated VTE. This supports the use of apixaban for the initiation and early phase of anticoagulant therapy in cancer-associated VTE.
Venous thromboembolism (VTE) is a common complication in cancer patients. Much of its morbidity stems from the development of fatal pulmonary embolisms (PE). Little is known about the factors involved in clot stability, with angiogenesis possibly being implicated. The database is from the TESEO prospective registry that recruits cancer patients with VTE from 41 Spanish hospitals. Independent validation was conducted in a cohort from the Caravaggio trial. The objective is to evaluate the association between exposure to antiangiogenic therapies and the PE/VTE proportion in oncological patients. In total, 1,536 subjects were evaluated; 58.4% (n = 894) had a PE and 7% (n = 108) received antiangiogenic therapy (bevacizumab in 75%). The PE/VTE proportion among antiangiogenic-treated individuals was 77/108 (71.3%) versus 817/1,428 (57.2%) among those receiving other alternative therapies (p = 0.004). The effect of the antiangiogenics on the PE/VTE proportion held up across all subgroups except for active smokers or those with chronic obstructive pulmonary disease. Exposure to antiangiogenics was associated with increased PEs, odds ratio (OR) 2.27 (95% CI, 1.42-3.63). In the Caravaggio trial, PE was present in 67% of the individuals treated with antiangiogenics, 50% of those who received chemotherapy without antiangiogenic treatment, and 60% without active therapy (p = 0.0016). Antiangiogenics are associated with increased proportion of PE in oncological patients with VTE. If an effect on clot stability is confirmed, the concept of thrombotic risk in cancer patients should be reconsidered in qualitative terms.
The prognostic value of the Systemic Inflammation Response Index (SIRI) in advanced pancreatic cancer is recognized, but its correlation with patients´ nutritional status and outcomes remains unexplored.
4017 Background: Biological agents, in combination with chemotherapy, are recommended as first-line treatment of metastatic colorectal cancer (mCRC); however, evidence guiding appropriate management of elderly patients with mCRC is lacking. This study compared the efficacy and safety outcomes in older versus younger patients with mCRC who received first-line biological therapy. Methods: This retrospective analysis used pooled data from five Spanish TTD collaborative group studies of adults with advanced CRC who received first-line treatment with bevacizumab, cetuximab or panitumumab, stratified by age (≥65 vs < 65 years). Endpoints included progression-free survival (PFS), overall survival (OS), overall response rate (ORR) and safety. Results: In total, 999 patients from five studies were included in the analysis; 480 (48%) were aged ≥65 years and 519 (52%) were aged < 65 years; 733 (73.37%) were treated with bevacizumab, 189 (18.92%) received cetuximab and 77 (7.71%) received panitumumab. Median PFS did not significantly differ between patients aged ≥65 versus < 65 years (9.9 vs 9.4 months; hazard ratio [HR] 1.01; 95% confidence interval [CI] 0.88–1.17). Median OS was significantly shorter in older versus younger patients (21.3 vs 25.0 months; HR 1.21; 95% CI 1.04–1.41; P = 0.0132). There was no significant difference between older versus younger patients in ORR (59% vs 62%). Older patients experienced more treatment-related grade ≥3 adverse events. Conclusions: Biological agents are an effective first-line treatment option for elderly patients with mCRC, with comparable efficacy in PFS and ORR to that observed in younger patients and a manageable safety profile.
e15136 Background: A recent study has suggested that KRAS mutation could increase the risk of VTE in patients with CRC. The role of others biomarkers, such as BRAF, in this setting is unknown. The aim of this study is to analyze the incidence of cancer-associated thrombosis in a cohort of patients with CRC based on KRAS, NRAS and BRAF status. Methods: We performed a retrospective review of patients with metastatic CRC and KRAS/NRAS/BRAF status known, attended in the Medical Oncology Department of the Hospital General Universitario Gregorio Marañón (Madrid, Spain) between January 2010 and January 2018. Results: 194 patients were identified and included in the analysis. The median age was 64 years (18-86). Most were metastatic at diagnosis (58.1%). Khorana’s predictive model: low-risk 67.7%, intermediate-risk 31.0%, high-risk 2.3%. The median follow-up was 35 months (2-240). 41 patients (21.1%) experienced VTE (11 pulmonary embolism, 15 lower extremity deep-vein thrombosis, 12 visceral vein thrombosis, 2 catheter-related thrombosis, 1 unknown). Most had metastatic disease at the moment of VTE (90.2%). 40% of the events occurred at the time of diagnosis or within the first 6 months. 65% were incidental events. Khorana’s predictive model in VTE patients: low-risk 63.4%, intermediate-risk 24.5%, high-risk 7.3%. According to biomarkers, the incidence was 19.1% (13/68) in KRAS/NRAS mutated patients, 28.6% (6/21) in BRAF mutated patients and 21% (22/105) in triple-wild-type patients. 6/38 patients (15.8%) developed recurrent thrombosis. In the univariate analysis, the presence of chronic kidney disease (p = 0.022), ECOG ≥ 2 (p = 0.038) and high-risk Khorana score (p = 0.011) were significantly associated with increased risk of VTE. Metastatic disease showed a trend towards the statistical significance (p = 0.053). In the multivariate model, including this variables, age, sex and biomarkers, only ECOG ≥ 2 remained independent predictor of VTE (OR 8.73; CI 95% 1.32-57.82; p = 0.025). Conclusions: The biomarkers have not been associated with the risk of VTE. We have observed a high incidence of VTE in BRAF mutated patients that should be investigated in further studies.