Luis Corrales-Rodriguez1, Denis Soulières2, Xiaoduan Weng2, Mustapha Tehfe2, Marie Florescu2, Normand Blais3. 1. Medical Oncologist, Grupo Costarricense contra el Cáncer/Hospital San Juan de Dios, CCSS San José, Costa Rica. 2. Medical Oncologist/Hematologist, Hôpital Notre-Dame, Centre Hospitalier de l'Université de Montréal, Montreal, Quebec, Canada. 3. Medical Oncologist/Hematologist, Hôpital Notre-Dame, Centre Hospitalier de l'Université de Montréal, Montreal, Quebec, Canada. Electronic address: n.blais@umontreal.ca.
Abstract
INTRODUCTION: The association of venous thromboembolic events (VTE) and lung cancer is highly prevalent. Additionally, the occurrence of a VTE with cancer has been associated with a worse prognosis and a poor quality of life. Underlying cancer biological features such as tumour mutations may contribute to VTE risk and cancer prognosis. Since preclinical data suggest a link between thrombosis and KRAS mutations in tumours, we aimed to validate this association in a patient registry cohort. METHODS: A retrospective case control study was performed using the CHUM NSCLC registry. Cases had VTE occurring 6months previous to or after a diagnosis of NSCLC. Diagnosis of VTE (venous thrombosis, pulmonary embolism, and migratory superficial thrombophlebitis) was confirmed by a review of the imaging reports. Controls were patients with NSCLC without thrombosis matched for age and stage (I-IIIA/IIIB-IV). Exclusion criteria included insufficient tissue for KRAS/EGFR mutation analysis or insufficient clinical information. RESULTS: Between Jan 2000 and Dec 2009 a total of 57 cases with VTE and 102 controls without VTE were included. The OR for thrombosis in KRAS and EGFR mutated NSCLC patients are respectively 2.67 (1.12-6.42; p=0.014) and 0.99 (0.27-3.48; p=0.99). CONCLUSIONS: KRAS mutation is associated with an increased risk of VTE in this NSCLC cohort. These findings are consistent with preclinical studies. Prospective data on VTE rates from clinical trials with molecularly defined NSCLC are needed to confirm these findings.
INTRODUCTION: The association of venous thromboembolic events (VTE) and lung cancer is highly prevalent. Additionally, the occurrence of a VTE with cancer has been associated with a worse prognosis and a poor quality of life. Underlying cancer biological features such as tumour mutations may contribute to VTE risk and cancer prognosis. Since preclinical data suggest a link between thrombosis and KRAS mutations in tumours, we aimed to validate this association in a patient registry cohort. METHODS: A retrospective case control study was performed using the CHUM NSCLC registry. Cases had VTE occurring 6months previous to or after a diagnosis of NSCLC. Diagnosis of VTE (venous thrombosis, pulmonary embolism, and migratory superficial thrombophlebitis) was confirmed by a review of the imaging reports. Controls were patients with NSCLC without thrombosis matched for age and stage (I-IIIA/IIIB-IV). Exclusion criteria included insufficient tissue for KRAS/EGFR mutation analysis or insufficient clinical information. RESULTS: Between Jan 2000 and Dec 2009 a total of 57 cases with VTE and 102 controls without VTE were included. The OR for thrombosis in KRAS and EGFR mutated NSCLCpatients are respectively 2.67 (1.12-6.42; p=0.014) and 0.99 (0.27-3.48; p=0.99). CONCLUSIONS:KRAS mutation is associated with an increased risk of VTE in this NSCLC cohort. These findings are consistent with preclinical studies. Prospective data on VTE rates from clinical trials with molecularly defined NSCLC are needed to confirm these findings.
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