UNLABELLED: We show that detection, by week-2 magnetic resonance imaging, of tumor shrinkage >10% in response to therapy with cetuximab or panitumumab for metastatic colorectal carcinoma represents an early indicator of clinical outcome because it is predictive of the prolongation of progression-free survival and overall survival. PURPOSE: The early identification of patients with metastatic colorectal carcinoma who are likely to benefit from treatment with panitumumab or cetuximab remains of paramount importance. We evaluated whether the early tumor shrinkage assessed by magnetic resonance imaging (MRI) is predictive of long-term outcome to these epidermal growth factor receptor-targeted therapies. PATIENTS AND METHODS: Thirty-nine patients with chemorefractory metastatic colorectal carcinoma were treated with cetuximab or panitumumab. The patients were evaluated by unenhanced MRI at baseline, week 2, and week 8 after the beginning of the treatment and by contrast-enhanced computed tomography within 3 months. Early response was defined as a tumor shrinkage ≥ 10% at week-2 MRI, whereas response by contrast-enhanced computed tomography was defined according to standard Response Evaluation Criteria in Solid Tumors 1.1. RESULTS: At week-2 MRI, 15 (38.5%) of 39 patients had an early response. Eleven (73.3%) of these 15 early responders then presented a partial response by contrast-enhanced computed tomography, whereas none of the 24 early nonresponders obtained a partial response (P < .0005, Fisher exact test). Median progression-free survival (PFS) was 29.7 and 8 weeks in patients with or without early response, respectively (hazard ratio [HR] 0.156 [95% CI, 0.069-0.355]; P < .0001)]. The median overall survival (OS) was 80 weeks in patients with early response and 23.3 weeks in those without early response, respectively (HR 0.154 [95% CI, 0.057-0.420]; P < .00005]). CONCLUSIONS: Early detection of tumor response by week-2 MRI without contrast medium is associated with a prediction of clinical outcome in patients with metastatic colorectal carcinoma treated with cetuximab or panitumumab.
UNLABELLED: We show that detection, by week-2 magnetic resonance imaging, of tumor shrinkage >10% in response to therapy with cetuximab or panitumumab for metastatic colorectal carcinoma represents an early indicator of clinical outcome because it is predictive of the prolongation of progression-free survival and overall survival. PURPOSE: The early identification of patients with metastatic colorectal carcinoma who are likely to benefit from treatment with panitumumab or cetuximab remains of paramount importance. We evaluated whether the early tumor shrinkage assessed by magnetic resonance imaging (MRI) is predictive of long-term outcome to these epidermal growth factor receptor-targeted therapies. PATIENTS AND METHODS: Thirty-nine patients with chemorefractory metastatic colorectal carcinoma were treated with cetuximab or panitumumab. The patients were evaluated by unenhanced MRI at baseline, week 2, and week 8 after the beginning of the treatment and by contrast-enhanced computed tomography within 3 months. Early response was defined as a tumor shrinkage ≥ 10% at week-2 MRI, whereas response by contrast-enhanced computed tomography was defined according to standard Response Evaluation Criteria in Solid Tumors 1.1. RESULTS: At week-2 MRI, 15 (38.5%) of 39 patients had an early response. Eleven (73.3%) of these 15 early responders then presented a partial response by contrast-enhanced computed tomography, whereas none of the 24 early nonresponders obtained a partial response (P < .0005, Fisher exact test). Median progression-free survival (PFS) was 29.7 and 8 weeks in patients with or without early response, respectively (hazard ratio [HR] 0.156 [95% CI, 0.069-0.355]; P < .0001)]. The median overall survival (OS) was 80 weeks in patients with early response and 23.3 weeks in those without early response, respectively (HR 0.154 [95% CI, 0.057-0.420]; P < .00005]). CONCLUSIONS: Early detection of tumor response by week-2 MRI without contrast medium is associated with a prediction of clinical outcome in patients with metastatic colorectal carcinoma treated with cetuximab or panitumumab.
Authors: Avery S Walker; Nathan P Zwintscher; Eric K Johnson; Justin A Maykel; Alexander Stojadinovic; Aviram Nissan; Itzhak Avital; Björn Ldm Brücher; Scott R Steele Journal: J Cancer Date: 2014-01-05 Impact factor: 4.207
Authors: Eric Van Cutsem; Henk M W Verheul; Patrik Flamen; Philippe Rougier; Regina Beets-Tan; Rob Glynne-Jones; Thomas Seufferlein Journal: Cancers (Basel) Date: 2016-08-31 Impact factor: 6.639
Authors: Riccardo Ricotta; Antonella Verrioli; Silvia Ghezzi; Luca Porcu; A Grothey; Alfredo Falcone; Eric Van Cutsem; Guillem Argilés; Antoine Adenis; Marc Ychou; Carlo Barone; Olivier Bouché; Marc Peeters; Yves Humblet; Laurent Mineur; Alberto F Sobrero; Joleen M Hubbard; Chiara Cremolini; Hans Prenen; Josep Tabernero; Hajer Jarraya; Thibault Mazard; Sophie Deguelte-Lardiere; Konstantinos Papadimitriou; Marc Van den Eynde; Alessandro Pastorino; Daniela Redaelli; Katia Bencardino; Chiara Funaioli; Alessio Amatu; Giulia Carlo-Stella; Valter Torri; Andrea Sartore-Bianchi; Angelo Vanzulli; Salvatore Siena Journal: ESMO Open Date: 2017-02-13