Efficacy of oral chemotherapy with capecitabine and temozolomide (CapTem) in metastatic neuroendocrine tumors (NETs): A single-institution experience.

Authors

null

Valeria Smiroldo

Humanitas Research Hospital-IRCCS, Rozzano (Milan), Italy

Valeria Smiroldo , Carlo Carnaghi , Lorenza Rimassa , Nicola Personeni , Tiziana Pressiani , Silvia Bozzarelli

Organizations

Humanitas Research Hospital-IRCCS, Rozzano (Milan), Italy

Research Funding

Other

Background: CapTem chemotherapy regimen represents one of the standard of treatment for NETs, an interesting option of care due to its feasibility and efficacy although not enough prospective data support this evidence. Methods: This retrospective analysis included all patients (pts) with metastatic NETs treated with CapTem regimen at our institution from April 2013 to April 2017. This oral chemotherapy included capecitabine 600 mg/m2/BID (capped at 1,000 mg BID total dose) on days 1–14 and temozolomide 75 mg/m2/BID on days 10–14 every 28 days according to the schedule published by Fine RL et al. (Cancer Chemother Pharmacol, 2013). Overall survival (OS), progression free survival (PFS), overall response rate (ORR) and toxicities were retrospectively evaluated. Results: Twenty-seven pts (15 males) were included. Median age was 61 yrs (range 46-85). Primary tumor included pancreas in 8 pts (29.6%), midgut 8 pts (29.6%), lung 8 pts (29.6%), other NETs 3 pts (11.1%). Most of pts had well-differentiated tumors (88.8%) and Ki67 was less than <20% in 59% of pts. Median number of cycles was 6 (range 2-25). Ten pts (37.0%) received CapTem as 1st line treatment, 7 pts (25.9%) as 2nd line and 10 (37.0%) pts as > 3rd line. ORR was 33.3%; 31.2% for Ki67 < 20% group and 40.0% in Ki67 >20%. DCR (partial response + stable disease) for the entire cohort was 59.2%. Median PFS was 4 mos, without any differences between pancreatic, midgut and lung groups, but mPFS was 8.0 mos for pts who received CapTem as 1st line treatment. At present mOS was not reached. In term of toxicity CapTem regimen was very well tolerated and only 1 pt reported a G3 reversible toxicity (neutropenia). No G3/4 toxicity were observed. Conclusions: Our experience confirms that CapTem regimen is effective and well tolerated. Efficacy does not seem to be related to the primary tumor or Ki67. DCR and ORR are superior to the response produced by tyrosine kinase inhibitors, suggesting a strategy when tumour shrinkage and symptom control are needed.

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Abstract Details

Meeting

2018 Gastrointestinal Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session B: Cancers of the Pancreas, Small Bowel, and Hepatobiliary Tract

Track

Cancers of the Pancreas, Small Bowel, and Hepatobiliary Tract

Sub Track

Multidisciplinary Treatment

Citation

J Clin Oncol 36, 2018 (suppl 4S; abstr 487)

DOI

10.1200/JCO.2018.36.4_suppl.487

Abstract #

487

Poster Bd #

N11

Abstract Disclosures