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Poster display session

2805 - Chemotherapy-induced thrombocytopenia (CIT) in metastatic colorectal cancer (mCRC) patients


09 Sep 2017


Poster display session


Supportive Care and Symptom Management;  Therapy;  Colon and Rectal Cancer


Karynsa Cetin


Annals of Oncology (2017) 28 (suppl_5): v158-v208. 10.1093/annonc/mdx393


K. Cetin1, A. Toler2, M. Eisen3, G.A. Soff4

Author affiliations

  • 1 Center For Observational Research, AMGEN (Headquarters) - USA, 91320-1799 - Thousand Oaks/US
  • 2 Center For Observational Research, ICON/Docs Global, Inc. and AMGEN (Headquarters) - USA, 91320-1799 - Thousand Oaks/US
  • 3 Global Development, AMGEN (Headquarters) - USA, 91320-1799 - Thousand Oaks/US
  • 4 Hematology Service, Memorial Sloan-Kettering Cancer Center, 10065 - New York City/US


Abstract 2805


Thrombocytopenia is a common hematologic toxicity of myelosuppressive chemotherapy and can complicate a patient’s care.


This is a descriptive secondary analysis of data from two large clinical trials of mCRC patients – 1,078 treatment-naïve patients receiving fluorouracil, leucovorin, and oxaliplatin (FOLFOX4) and 1,067 previously-treated patients receiving fluorouracil, leucovorin, and irinotecan (FOLFIRI) – to investigate the frequency and clinical consequences of CIT. Evidence of CIT was studied in two ways: 1) recorded platelet counts throughout the study (overall and by grade:


Evidence of CIT based solely on platelet count was relatively common in the FOLFOX4 study (37% of patients had ≥1 platelet count


In mCRC patients receiving chemotherapy, thrombocytopenia can pose a real clinical problem, commonly leading to chemotherapy delays and/or dose reductions and in some cases, necessitating platelet transfusion and cessation of chemotherapy treatment.

Clinical trial identification

This was a secondary analysis of data from two clinical trials: NCT00364013 and NCT00339183

Legal entity responsible for the study

Amgen Inc


Amgen Inc


K. Cetin: Employee of Amgen Inc and ownership of Amgen Inc stock. A. Toler: Employed by Amgen Inc M. Eisen: Employee of Amgen Inc and ownership of Amgen Inc stock. G.A. Soff: Research support from Amgen Inc. Consulting fees from Amgen Inc. Research funding from Janssen Pharmaceuticals.

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