Treatment and reasons for choosing treatment in breast cancer patients who underwent next-generation sequencing test.

IF 2.5 3区医学 Q3 ONCOLOGY Oncology Pub Date : 2025-02-04 DOI:10.1159/000543732

Rumi Nishimura, Kazuki Sudo, Rui Kitadai, Asuka Kawachi, Munehiro Ito, Mai Hoshino, Shosuke Kita, Ayumi Saito, Yuki Kojima, Aiko Maejima, Emi Noguchi, Hitomi S Okuma, Takafumi Koyama, Tatsunori Shimoi, Kan Yonemori

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引用次数: 0

Abstract

Introduction: Next-generation sequencing (NGS) is commonly used in clinical practice to decide treatment based on genomic information. This study was performed to optimize the proportion of actionable gene profiling and treatment based on genetic alterations in breast cancer at one of cancer centers in Japan.

Methods: Patients with breast cancer who reported NGS results at one of cancer centers in Japan from August 2019 to December 2023 were retrospectively investigated by reviewing their electronic medical records. Patients were examined using the OncoGuideTM NCC Oncopanel System, FoundationOne® CDx, or FoundationOne® Liquid CDx. The evidence levels for drug recommendation were added for each gene alteration according to the guidelines from three Japanese oncology-related societies. ''Actionable alterations'' were those at evidence levels A-D, including high microsatellite instability and high tumor mutation burden status. "Patients with recommended drug" (approved, investigational, and off-label drugs) were defined as those who were selected by the Molecular Tumor Board.

Results: Of the 106 patients, 54 were tested using the NCC Oncopanel System and 50 using FoundationOne CDx. The most frequent alterations were TP53 mutations (52.8%) and PIK3CA mutations (31.1%). Of the 56 patients (52.8%) with recommended drugs, 11 (10.4%) received genome-matched therapy and only three (2.8%) participated in clinical trials. The most common reason for not receiving genome-matched therapy was patient refusal for personal reasons, although clinical trials were available (18 patients).

Conclusion: The top reasons for patients not receiving the recommended genome-matched therapy were factors related to the patient, including a number of prior treatments higher than what was allowed by the eligibility criteria of the clinical trials, and poor physical condition. Most patients received four or more regimens of cytotoxic chemotherapy before NGS. NGS is only available at the late phase of treatment in Japan, which would constitute a problem for the treatment of breast cancer.

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来源期刊

Oncology 医学-肿瘤学

CiteScore

6.00

自引率

2.90%

发文量

审稿时长

6-12 weeks

期刊介绍： Although laboratory and clinical cancer research need to be closely linked, observations at the basic level often remain removed from medical applications. This journal works to accelerate the translation of experimental results into the clinic, and back again into the laboratory for further investigation. The fundamental purpose of this effort is to advance clinically-relevant knowledge of cancer, and improve the outcome of prevention, diagnosis and treatment of malignant disease. The journal publishes significant clinical studies from cancer programs around the world, along with important translational laboratory findings, mini-reviews (invited and submitted) and in-depth discussions of evolving and controversial topics in the oncology arena. A unique feature of the journal is a new section which focuses on rapid peer-review and subsequent publication of short reports of phase 1 and phase 2 clinical cancer trials, with a goal of insuring that high-quality clinical cancer research quickly enters the public domain, regardless of the trial’s ultimate conclusions regarding efficacy or toxicity.