LAUSR

e15048Background: Efficacy results of Folfox or Folfiri chemotherapies (CT) are not different as 1st line in mCRC patients, alone or with targeted therapies. No data reported on progression-free survival (PFS) of 1st line Folfiri after Folfox-based adjuvant CT and of 2nd line Folfiri-based CT after a Folfox-based 1st line. The objective was to evaluate the efficacy of a Folfiri-based CT after adjuvant or 1stline Folfox-based treatment. Methods: 210 of 568 pts from a mCRC database were retrospectively selected and divided in 2 cohorts: pts who received adjuvant Folfox then Folfiri as 1st line treatment (n = 76, AdjF) and those treated with Folfox as 1st line treatment then Folfiri 2nd line (n = 134, FFox). PFS1 was the time from beginning of Folfox to 1st progression and PFS2 the time from the Irinotecan-based CT to 2ndprogression. Results: Median age was 62 (22-80). 49.3% pts had synchronous liver (72%) metastases. Primary tumour was right and left colon in 22% and 70% patients. Primary tumour was resecte...