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Attend this session at the
2019 ASCO Annual Meeting!


Session: Gastrointestinal (Colorectal) Cancer

Type: Poster Session

Time: Monday June 3, 8:00 AM to 11:00 AM

Location: Hall A


Session: Gastrointestinal (Colorectal) Cancer

Type: Poster Discussion Session

Time: Monday June 3, 11:30 AM to 1:00 PM

Location: Arie Crown Theater

Repeated centralized MDT resectability assessment during first-line treatment in 1086 Finnish metastatic colorectal cancer (mCRC) patients nationwide (prospective RAXO study).

Sub-category:
Advanced Disease

Category:
Gastrointestinal (Colorectal) Cancer

Meeting:
2019 ASCO Annual Meeting

Abstract No:
3517

Poster Board Number:
Poster Discussion Session (Board #9)

Citation:
J Clin Oncol 37, 2019 (suppl; abstr 3517)

Author(s): Pia J. Osterlund, Raija Sinikka Kallio, Ilmo Kellokumpu, Leena-Maija Soveri, Annika Ålgars, Tapio Salminen, Maija-Leena Murashev, Annamarja Lamminmaki, Päivi Halonen, Raija Ristamäki, Eila Lantto, Ali Ovissi, Arno Nordin, Laura Aroviita, Antti Pekka Jekunen, Renee Lindvall-Andersson, Paul Nyandoto, Juha Teppo Kononen, Tuija Poussa, Helena Isoniemi, The RAXO Study Group; Tampere University and Central Hospital, Tampere, Finland; Oulu University Hospital, Oulu, Finland; Department of Surgery, Central Hospital of Central Finland,, Jyväskylä, Finland; Department of Oncology, Helsinki University Hospital, Helsinki, Finland; Turku University Hospital, Department of Oncology and Radiotherapy, Turku, Finland; Tampere University Hospital, Tampere, Finland; Satakunta Central Hospital, Pori, Finland; Department of Oncology, Kuopio University Hospital, Kuopio, Finland; Helsinki University Hospital, Helsinki, Finland; Helsinki University Hospital, Radiology, Helsinki, Finland; Department of Radiology - Helsinki University Hospital, Helsinki, Finland; Transplantation and Liver Surgery Department, Helsinki University Hospital, Helsinki, Finland; Kanta-Häme Central Hospital, Hämeenlinna, Finland; Vaasa Central Hospital VSHP, Vaasa, Finland; Åland Central Hospital, Mariehamn, Finland; Päijäthäme Central Hospital, Lahti, Finland; Keski-Suomen Keskussairaala, Jyväskylä, Finland; STAT-Consulting Tuija Poussa, Nokia, Finland; Division of Transplantation and Liver Surgery, Helsinki University Central Hospital, Helsinki, Finland

Abstract Disclosures

Abstract:

Background: Resection of oligometastatic mCRC is curable in up to half and is probably underused in real-life oncology practice. In 2011, a prospective nationwide centralized evaluation of resectability was initiated to assess upfront and conversion to resectability. Methods: The RAXO-study included 1086 mCRCs referred for oncological treatments at all 21 Finnish oncology units (40% of eligible mCRCs in Finland). The MDT at Helsinki tertiary referral center (TRC) assessed resectability of liver, lung and other metastases upfront and twice during first-line therapy. Resectability evaluation was provided online and resections were performed according to clinical praxis, with major resections at TRCs. Results: Median age was 66.5 (range 24-90) yrs, 60% males, ECOG was 0 in 295 (27%), 1 in 600 (55%) and 2-3 in 191 (18%). Tumor was right-sided in 310 (29%), left in 769 (72%) and multiple in 7 (.6%). In the MDT assessment, 435 (40%) were considered resectable, 28% upfront and 12% after conversion. Resections or local ablative therapy were performed in 396 (91% of resectable, R0-1 in 74% and R2 in 17%), with 368 liver-, 91 lung- and 96 other operations. One metastatic site (n = 407), 2 (n = 369) and 3-6 (n = 310) were or became resectable in 65, 33 and 15%, respectively, and R0-1 resected in 54, 30 and 6%, respectively (P < 0.001). In multivariate analysis age < 66.5 (OR 1.51), ECOG 0 (OR 2.40); left-sided primary (OR 1.55), metachronous metastases (OR 1.49), 1-2 metastatic sites (OR 1.86) increased R0-1 resection rates; whereas primary/relapse in situ (OR 0.49), metastases in lung (OR 0.22), peritoneum (OR 0.30) or lymph nodes (OR 0.23) decreased R0-1 rates (P < 0.05). In univariate analyses BRAF wt (OR 0.34), normal CEA (OR 0.31) or normal Ca19-9 (OR 0.45) associated with R0-1 rates. Median OS was 2.4 yrs (CI95% 2.3-2.6) in all, 6.7 yrs in R0-1 (HR 0.15; CI95% 0.11-0.19), 2.8 yrs in R2 (0.50; 0.36-0.68) and 1.7 yrs in non-resected (reference group). Median PFS was 1.1 yrs (1.0-1.1) in all patients, 2.4 yrs in R0-1 (0.24; 0.20-0.28), 1.4 yrs in R2 (0.55; 0.42-0.71) and 0.8 yrs in non-resected patients. P < 0.001 for all comparisons. Conclusions: Repeated centralized MDTs in real-life mCRC patients show high resectability (40%) and resection rates (36%), even if multiple metastatic sites are present. Curative resection associates with good survival. Clinical trial information: NCT01531621

 
Other Abstracts in this Sub-Category:

 

1. Randomized phase III study comparing FOLFOX + bevacizumab versus folfoxiri + bevacizumab (BEV) as 1st line treatment in patients with metastatic colorectal cancer (mCRC) with ≥3 baseline circulating tumor cells (bCTCs).

Meeting: 2019 ASCO Annual Meeting Abstract No: 3507 First Author: Javier Sastre
Category: Gastrointestinal (Colorectal) Cancer - Advanced Disease

 

2. Updated results of TRIBE2, a phase III, randomized strategy study by GONO in the first- and second-line treatment of unresectable mCRC.

Meeting: 2019 ASCO Annual Meeting Abstract No: 3508 First Author: Chiara Cremolini
Category: Gastrointestinal (Colorectal) Cancer - Advanced Disease

 

3. A randomized phase II trial of second-line CAPTEM versus FOLFIRI in MGMT methylated, RAS mutated metastatic colorectal cancer (mCRC) patients.

Meeting: 2019 ASCO Annual Meeting Abstract No: 3509 First Author: Filippo Pietrantonio
Category: Gastrointestinal (Colorectal) Cancer - Advanced Disease

 

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