Treatment efficacy of ramucirumab-based chemotherapy in patients with alpha-fetoprotein producing gastric cancer (AFPGC).

Authors

null

Daisaku Kamiimabeppu

Cancer Institute Hospital of JFCR, Tokyo, Japan

Daisaku Kamiimabeppu , Takeru Wakatsuki , Daisuke Takahari , Naoki Fukuda , Hiroki Osumi , Izuma Nakayama , Mariko Ogura , Tarou Sato , Akira Ooki , Eiji Shinozaki , Mitsukuni Suenaga , Keisho Chin , Kensei Yamaguchi

Organizations

Cancer Institute Hospital of JFCR, Tokyo, Japan, Department of Gastroenterology, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan, Department of Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan, Dep. Gastroenterology, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Koto-Ward Tokyo, Japan, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan, Department of Gastroenterology, The Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan

Research Funding

No funding received
None

Background: AFPGC is an aggressive subgroup of gastric cancer and is associated with a worsened survival because of a high incidence of liver metastasis. Ramucirumab-based chemotherapy is the standard treatment as a second line in advanced gastric cancer. Recently ramucirumab has showed survival benefit in hepatocellular carcinoma, but only those with higher AFP levels. However, the efficacy of ramucirumab in AFPGC is unknown. Methods: We retrospectively assessed 283 patients who received paclitaxel or nab-paclitaxel combined with ramucirumab between July 2015 and December 2018. AFPGC was defined when serum AFP levels were elevated and correlated with the disease state during treatment. Non-AFPGC was defined when serum AFP levels were normal when diagnosed. Other patients were excluded. Patients’ demographics, progression-free survival (PFS), overall survival (OS) and objective response rates (ORR) were compared between the two groups. Results: Among the 283 patients, 24 patients were AFPGC and 189 patients were non-AFPGC. AFPGC was associated with high incidences of intestinal histology (46%) and liver metastasis (63%), while AFPGC was associated with a low incidence of peritoneal metastasis (21%), compared with non-AFPGC. There was no significant difference in PFS and OS between the two groups. Median PFS were 5.4 (95%CI 3.6-6.7) months in AFPGC and 4.1 (3.7-5.1) months in non-AFPGC (HR 0.93 95%CI 0.60-1.46, p = 0.788), respectively. Median OS were 19.0 (95%CI 13.2-NA) months in AFPGC and 19.3 (17.9-20.1) months in non-AFPGC (HR 1.21 95%CI 0.70-2.10, p = 0.494), respectively. Regarding with ORR, AFPGC showed higher ORR with 52.6% (95%CI 30.2-75.1), while 37.3% (95%CI 26.4-48.3) in non-AFPGC (p = 0.296), although this was not statistically significant. Conclusions: Ramucirumab showed comparable survival and higher ORR in AFPGC than in non-AFPGC. Considering the generally poor prognosis of AFPGC, it is speculated that ramucirumab may have compensated for disadvantage in survival.

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Abstract Details

Meeting

2020 Gastrointestinal Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session A: Esophageal and Gastric Cancer and Other GI Cancers

Track

Esophageal and Gastric Cancer,Other GI Cancer

Sub Track

Therapeutics

Citation

J Clin Oncol 38, 2020 (suppl 4; abstr 389)

Abstract #

389

Poster Bd #

E22

Abstract Disclosures