Abstract:
BACKGROUND:Neoadjuvant chemoradiation therapy (CRT) is standard of care treatment for locally advanced rectal cancer (LARC). A pathologic complete response (pCR) following CRT is an early indicator of treatment benefit and associated with excellent survival outcomes. As capecitabine replaces infusional 5-fluorouracil (5-FU) as the fluoropyrimidine of choice in routine care of LARC, on the back of clinical trial data demonstrating equivalence, it is important to confirm that efficacy is maintained in the real-world setting. METHODS:We analysed data from a prospectively maintained colorectal cancer database at 3 Australian hospitals including patients diagnosed January 2009 to December 2018. Pathological response was determined as either complete or incomplete and compared for patients receiving 5FU or capecitabine. RESULTS:657 patients were analysed, 498 receiving infusional 5-FU and 159 capecitabine. Capecitabine use has markedly increased from approval in 2014 in Australia, now being used in more than 80% of patients. Patient characteristics were similar by treatment, including age, tumour location and pre-treatment stage. pCR was reported in 22/159 (13.8%) of capecitabine treated patients and 118/380 (23.7%) that received 5-FU (p = <0.01). More capecitabine-treated patients received post-operative oxaliplatin (44.2% vs 6.3%, p < 0.01). Two-year progression free survival was similar (84.9% vs 88.0%, p = 0.34). CONCLUSION:Capecitabine is now the dominantly used neoadjuvant chemotherapy in LARC. Capecitabine use was associated with a lower rate of pCR versus infusional 5-FU, a difference not explained by examined patient or tumour characteristics. Poor treatment compliance with oral therapy in the real-world setting is one possible explanation. This article is protected by copyright. All rights reserved.
journal_name
Intern Med Jjournal_title
Internal medicine journalauthors
Loft M,Wong HL,Kosmider S,Lee M,Tie J,Wong R,Jones IT,Croxford M,Steel M,Faragher I,Guerrieri M,Christie M,Gibbs Pdoi
10.1111/imj.15045subject
Has Abstractpub_date
2020-09-08 00:00:00eissn
1444-0903issn
1445-5994pub_type
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