PMID- 35678328 OWN - NLM STAT- MEDLINE DCOM- 20220928 LR - 20220930 IS - 1097-0215 (Electronic) IS - 0020-7136 (Linking) VI - 151 IP - 10 DP - 2022 Nov 15 TI - Early onset metastatic colorectal cancer in patients receiving panitumumab-based upfront strategy: Overall and sex-specific outcomes in the Valentino trial. PG - 1760-1769 LID - 10.1002/ijc.34156 [doi] AB - Anti-EGFRs plus doublet chemotherapy is considered the optimal upfront option for RAS/BRAF wild-type left-sided metastatic colorectal cancer (mCRC). Early-onset (EO) mCRC has an increasing incidence and its prognostic/predictive role and management is debatable. We performed a post hoc analysis of Valentino study, that randomized RAS wild-type mCRC patients to two panitumumab-based maintenance regimens after FOLFOX/panitumumab induction. We assessed the safety and efficacy outcomes in patients stratified for age (<50/>/=50 years old). We assessed progression-free survival (PFS), overall survival (OS), response rate (ORR), rate of treatment-related and panitumumab-related adverse events (AEs) and quality of life (QoL). In 229 patients enrolled, 35 (15%) had EO mCRC, with a higher rate of female sex (P = .020) and lower rate of primary tumor resection (P = .001). Median PFS and OS were 10.9 vs 10.8 months (P = .593) and 28.1 vs 27.5 months (P = .865) in patients <50 and >/=50 years old, respectively, with no significant impact of maintenance arm. ORR and disease control rate were 74% vs 65% (P = .337) and 97% vs 81% (P = .013) in patients <50 or >/=50 years old. In younger patients, a trend for increased chemotherapy-related AEs (peculiarly anemia) was shown, while significantly decreased EGFR-related hypomagnesemia and increased skin rash were reported. No significant differences in treatment intensity or QoL were observed. In patients with EO mCRC and RAS wild-type status, we found no differences in terms of survival outcomes based on age when selecting maintenance strategies. Management of treatment-related AEs should consider the differential toxicity profile of age and sex. CI - (c) 2022 UICC. FAU - Raimondi, Alessandra AU - Raimondi A AUID- ORCID: 0000-0002-8999-2899 AD - Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy. FAU - Randon, Giovanni AU - Randon G AD - Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy. FAU - Prisciandaro, Michele AU - Prisciandaro M AD - Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy. AD - Oncology and Hemato-oncology Department, University of Milan, Milan, Italy. FAU - Pagani, Filippo AU - Pagani F AD - Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy. FAU - Lonardi, Sara AU - Lonardi S AD - Department of Oncology, Veneto Institute of Oncology IRCCS, Padua, Italy. FAU - Antoniotti, Carlotta AU - Antoniotti C AD - Unit of Medical Oncology, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy. FAU - Bozzarelli, Silvia AU - Bozzarelli S AD - Medical Oncology and Hematology Unit, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, Rozzano, Italy. FAU - Sartore-Bianchi, Andrea AU - Sartore-Bianchi A AD - Oncology and Hemato-oncology Department, University of Milan, Milan, Italy. AD - Division of Oncology, Grande Ospedale Metropolitano Niguarda, Milan, Italy. FAU - Tampellini, Marco AU - Tampellini M AD - Department of Oncology, AOU San Luigi di Orbassano, University of Torino, Orbassano, Italy. FAU - Fanchini, Laura AU - Fanchini L AD - SSD ColoRectal Cancer Unit-Dipartimento di Oncologia, AOU Citta della Salute e della Scienza di Torino, Torino, Italy. FAU - Murialdo, Roberto AU - Murialdo R AD - Department of Internal Medicine, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy. FAU - Clavarezza, Matteo AU - Clavarezza M AD - Medical Oncology Unit, Ente Ospedaliero Ospedali Galliera, Genoa, Italy. FAU - Zaniboni, Alberto AU - Zaniboni A AD - Medical Oncology Unit, Fondazione Poliambulanza, Brescia, Italy. FAU - Berenato, Rosa AU - Berenato R AD - Medical Oncology Unit, AO Papardo, Messina, Italy. FAU - Ratti, Margherita AU - Ratti M AD - Medical Oncology Unit, ASST Ospedale di Cremona, Cremona, Italy. FAU - Petrelli, Fausto AU - Petrelli F AD - Medical Oncology Unit, Oncology Department, ASST Bergamo Ovest, Treviglio, Italy. FAU - Antonuzzo, Lorenzo AU - Antonuzzo L AD - Clinical Oncology Unit, AOU Careggi, Florence, Italy. AD - Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy. FAU - Giordano, Monica AU - Giordano M AD - Medical Oncology Unit, Azienda Socio Sanitaria Territoriale Lariana, Como, Italy. FAU - Rossi, Alessandro AU - Rossi A AD - Department of Clinical and Molecular Medicine, Oncology Unit, "La Sapienza" University of Rome, Azienda Ospedaliera Sant'Andrea, Rome, Italy. FAU - Di Bartolomeo, Maria AU - Di Bartolomeo M AD - Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy. FAU - Di Maio, Massimo AU - Di Maio M AD - Department of Oncology, University of Turin, Division of Medical Oncology, Ordine Mauriziano Hospital, Turin, Italy. FAU - Pietrantonio, Filippo AU - Pietrantonio F AUID- ORCID: 0000-0002-8530-8420 AD - Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy. FAU - Morano, Federica AU - Morano F AD - Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20220623 PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 RN - 6A901E312A (Panitumumab) RN - EC 2.7.11.1 (Proto-Oncogene Proteins B-raf) RN - U3P01618RT (Fluorouracil) SB - IM MH - Antineoplastic Combined Chemotherapy Protocols/adverse effects MH - *Colorectal Neoplasms/drug therapy/genetics MH - Female MH - Fluorouracil/therapeutic use MH - Humans MH - Male MH - Middle Aged MH - Panitumumab/therapeutic use MH - Prognosis MH - Proto-Oncogene Proteins B-raf MH - *Quality of Life OTO - NOTNLM OT - EGFR inhibitor OT - age OT - colorectal cancer OT - early-onset colorectal cancer OT - metastasis EDAT- 2022/06/10 06:00 MHDA- 2022/09/28 06:00 CRDT- 2022/06/09 07:12 PHST- 2022/05/24 00:00 [revised] PHST- 2022/03/28 00:00 [received] PHST- 2022/05/25 00:00 [accepted] PHST- 2022/06/10 06:00 [pubmed] PHST- 2022/09/28 06:00 [medline] PHST- 2022/06/09 07:12 [entrez] AID - 10.1002/ijc.34156 [doi] PST - ppublish SO - Int J Cancer. 2022 Nov 15;151(10):1760-1769. doi: 10.1002/ijc.34156. Epub 2022 Jun 23.