Prevalence and Clinicopathologic Features of Different HER2 Level in Chinese Breast Cancer Patients

N/ACompletedNCT05203458

AstraZeneca3,136 enrolled

Overview

This retrospective study aims to estimate the prevalence of different HER2 expression levels (HER2+, HER2-low, HER2 Ø) in approximately 200 breast cancer patients at FUSCC through the year of 2015 and 3000 breast cancer patients from about 10 medical centres in China between July 2021 and July 2022

This is a multicenter, retrospective study to estimate the prevalence of different HER2 expression levels (HER2+, HER2-low, HER2 Ø) in approximately 200 breast cancer patients at FUSCC through the year of 2015 and 3000 breast cancer patients from about 10 medical centres in China between July 2021 and July 2022. This study will be divided into two parts： The first part will include 200 subjects who were pathologically diagnosed with breast cancer at FUSCC between Jan 2015 and Dec 2015 (PART 1).This part will collect rescored HER2 expression level results based on the archived HER2 IHC slides and re-staining and re-scoring HER-2 IHC while relative demographic, treatment, and clinicopathologic data will be extracted from the FUSCC Breast Cancer Single Disease Database. The second part will include 3000 patients from all sites in China who were pathologically diagnosed with breast cancer between July 2021 and July 2022 (PART 2). This part will collect re-assessed HER2 expression level results based on the archived HER2 IHC slides. The general information of patients, diagnosis, clinicopathological information were collected from medical records, Hospital Information System (HIS) and Laboratory Information Management System (LIS). In PART 2, among 3000 patients, 270 from all participating sites except FUSCC should have enough tumor tissue for re-staining and re-scoring HER-2 IHC at FUSCC to analyse the concordance between leading site and other centers. In PART 2, among 3000 patients, 800 HER-2 IHC samples will be selected for the validation through AI-assisted HER2 assessment system

Study Type

OBSERVATIONAL

Enrollment

3,136

Conditions

Breast Cancer, HER2

Eligibility

Sex: ALL

Medical Language ↔ Plain English

Inclusion Criteria: Patients fulfilling all of the following criteria will be eligible for this study: * Male and female patients must have a histological confirmed diagnosis of BC * The patients must be ≥18 years old at the diagnosis. * In PART 1, all patients should be diagnosed at FUSCC between Jan 2015 and Dec 2015. * In PART 2, all patients should be diagnosed at all participating sites between July 2021 and July 2022. * Provision of at least 1 archived HER2 IHC slides associated with confirmed diagnosis of BC, which are in good condition for rescoring. * FISH result is available for HER2 IHC2+ in primary scoring. Exclusion Criteria: Patients who meet any of the following criteria will be disqualified from entering the study: * Absence of all demographic, histopathologic, clinicopathologic information . * Have a history of other malignancies, other than basal cell carcinoma of the skin and squamous cell carcinoma of the skin.

Locations (7)

Research Site

Shanghai, Shanhai, China

Research Site

Guangzhou, China

Research Site

Jinan, China

Research Site

Shenyang, China

Research Site

Outcomes

Primary Outcomes

The Prevalence of different HER2 expression levels

To estimate the prevalence of different HER2 expression levels (HER2+, HER2-low(defined as IHC 1+,2+/ISH-), HER2 Ø) in Chinese breast cancer patients in PART 2.

Time frame: Within one year

Secondary Outcomes

Tumor size of histopathological

Tumor size of Histopathological characteristic by different HER2 expression level (Ø /Low/High) in PART 1 and PART 2

Time frame: Within one year

Positive lymph node number of the histopathological

Positive lymph node number of histopathological characteristic by different HER2 expression level (Ø /Low/High) in PART 1 and PART 2

Time frame: Within one year

TNM stage by different HER2 expression levels

TNM stage by different HER2 expression level (Ø /Low/High) in PART 1 and PART 2

Time frame: Within one year

Pathological type of histopathological

Pathological type by different HER2 expression level (Ø /Low/High) in PART 1 and PART 2

Time frame: Within one year

Histological grade of histopathological

Histological grade by different HER2 expression level (Ø /Low/High) in PART 1 and PART 2

Time frame: Within one year

Multi-focal of histopathological

Multi-focal by different HER2 expression level (Ø /Low/High) in PART 1 and PART 2

Time frame: Within one year

Data from ClinicalTrials.gov

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