Chemotherapeutic outcomes for metastatic colorectal cancer in elderly patients aged ≥75 years: A single-institutional retrospective analysis

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Abstract

Aim:

To reveal systemic chemotherapy outcomes and the suitable first-line regimens for elderly (≥75 years) metastatic colorectal cancer (mCRC) patients.

Methods:

We retrospectively compared systemic chemotherapy outcomes between elderly (≥75 years) and adult (≤74 years) patients with mCRC who were treated between January 2007 and December 2012 at Hiroshima University Hospital and analyzed the outcomes of elderly patients after treatment with single-agent oral 5-fluorouracil chemotherapy (oral FC) or intravenous combination chemotherapy (IV CC) as the first-line regimen.

Results:

A total of 140 patients with mCRC were enrolled. The median age of adult patients was 60 years, compared to 77 years for elderly patients. There were no significant differences between the two groups in terms of patient characteristics and the stage of cancer progression. Overall survival (OS) (median, 20.7 vs 26.5 months; P = 0.65) and first-line progression-free survival (PFS) (median, 11.0 vs 9.8 months; P = 0.36) did not differ significantly between elderly patients and adult patients. Among elderly patients, first-line PFS (median, 10.3 months vs. 11.8 months; P = 0.85) and the incidence of grade 3 adverse events (22.2% vs. 44.4%; P = 0.31) were similar in the oral FC and IV CC groups.

Conclusion:

The results of this study suggest that elderly patients with mCRC who can receive chemotherapy derive an equivalent survival benefit to adult patients. First-line oral FC may be better suited for elderly patients with mCRC.

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