Breast Cancer Research and Treatment

, Volume 148, Issue 1, pp 197–209 | Cite as

Lapatinib-associated mucocutaneous toxicities are clinical predictors of improved progression-free survival in patients with human epidermal growth factor receptor (HER2)-positive advanced breast cancer

  • Kazuhiro Araki
  • Ippei Fukada
  • Rie Horii
  • Shunji Takahashi
  • Futoshi Akiyama
  • Takuji Iwase
  • Yoshinori Ito
Epidemiology

Abstract

This study is aimed to identify clinical predictors, other than HER2 overexpression, for the response to lapatinib plus capecitabine (LAPCAP) in patients with HER2-positive advanced breast cancer (HER2ABC). Data from our medical records of 76 patients from June 2009 to March 2013 were analyzed. Evaluations of these patients with HER2ABC treated with LAPCAP included baseline characteristics, dose modifications, efficacy, and incidence of adverse events (AEs). With a median follow-up of 20 months, the median number of prior therapies for ABC before LAPCAP was 2 (range 0–13), and 66 patients had previously received trastuzumab. For LAPCAP, the overall response rate was 21 %, and the clinical benefit rate was 60 %. During the initial 12-month observation period, 93 % of patients had AEs. The most common AE was hand-foot syndrome (HFS) in 55 patients. Progression-free survival (PFS) was better in patients who had HFS than in those who did not (p = 0.0002). Since HFS is a well-known AE associated with CAP, whether CAP dose affected PFS or not was investigated, but no positive relationship was found. Since several studies with EGFR-targeted agents have suggested a positive correlation between cutaneous toxicities and outcomes, whether the incidence of any AEs affected PFS or not was explored among 76 patients. HFS, diarrhea, and rash were significant favorable factors (p = 0.0002, 0.0088, and 0.0011). The median PFS of patients who had all three AEs was 13.2 months, compared with 2.6 months for those who did not (p = 0.00000174). Mucocutaneous toxicities may be predictors of the response to LAP in patients with HER2ABC.

Keywords

HER2-positive advanced breast cancer Lapatinib Mucocutaneous toxicities Predictive marker 

Abbreviations

ABC

Advanced breast cancer

AE

Adverse event

ASCO/CAP

American Society of Clinical Oncology/College of American Pathologists

CBR

Clinical benefit rate

CIs

Confidence intervals

CR

Complete response

EGFR

Epidermal growth factor receptor

ER

Estrogen receptor

HER2

Human epidermal growth factor receptor

HFS

Hand-foot syndrome

IHC

Immunohistochemistry

NCI-CTC-AE

National Cancer Institute Common Terminology Criteria for Adverse Events

NSCLC

Non-small cell lung cancer

ORR

Overall response rate

OS

Overall survival

PFS

Progression-free survival

PR

Partial response

RECIST

Response evaluation criteria in solid tumors

SD

Stable disease

T-DM1

Trastuzumab emtansine

Notes

Conflict of interest

The authors declare that they have no conflict of interest.

Funding

Takeda Science Foundation to KA.

Supplementary material

10549_2014_3148_MOESM1_ESM.docx (433 kb)
Supplementary material 1 (DOCX 433 kb)

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Kazuhiro Araki
    • 1
  • Ippei Fukada
    • 1
  • Rie Horii
    • 4
    • 5
  • Shunji Takahashi
    • 3
  • Futoshi Akiyama
    • 4
    • 5
  • Takuji Iwase
    • 2
  • Yoshinori Ito
    • 1
  1. 1.Beast Medical Oncology, Breast Oncology CenterThe Cancer Institute Hospital of the Japanese Foundation for Cancer ResearchTokyoJapan
  2. 2.Breast Surgical Oncology, Breast Oncology CenterThe Cancer Institute Hospital of the Japanese Foundation for Cancer ResearchTokyoJapan
  3. 3.Medical OncologyThe Cancer Institute Hospital of the Japanese Foundation for Cancer ResearchTokyoJapan
  4. 4.The Cancer Institute Hospital of the Japanese Foundation for Cancer ResearchTokyoJapan
  5. 5.Division of PathologyThe Cancer Institute Hospital of the Japanese Foundation for Cancer ResearchTokyoJapan

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