Estrogen Receptor (ER) PET/CT Imaging in Breast Cancer

18F-Fluoroestradiol (18F-FES) is an estrogen receptor-targeting positron emission tomography tracer with high sensitivity and specificity for the detection of estrogen receptor（ER）-positive tumors . 18F-FES has been used as a predictive biomarker to demonstrate estrogen receptor heterogeneity , to evaluate the pharmacokinetics of estrogen receptor-targeted drugs ， to measure residual estrogen receptors during endocrine therapy and to determine biologically optimal doses of novel estrogen receptor-targeted drugs .This study aimes to explore the efficacy of 18F-FES PET/CT in evaluating the expression levels of ER in primary and metastatic breast cancer patients.

Study Overview

• Status: Recruiting
• Conditions: Breast Cancer; TNBC - Triple-Negative Breast Cancer; Estrogen-receptor-negative Breast Cancer

Detailed Description

Breast cancer is the most common cancer in women, and up to 70% of breast cancer patients are positive for hormone receptors. Most of them are estrogen receptor (ER) positive, and more than 95% of progesterone receptor (PR) positive tumors are also ER positive. The staging system most commonly used for BC is the American Joint Committee on Cancer TNM system, which is based on seven criteria - tumor extent (T), spread to nearby lymph nodes (N), spread (metastasis) to distant sites (M), cancer grade ( G), estrogen receptor (ER) status, progesterone receptor status (PR) and HER2/neu . Breast cancer is characterized by different pathological features, different responses to treatment, and significant differences in long-term survival among patients . In general, the molecular typing of breast cancer is mainly divided into four types: the first, luminalA type refers to ER, PR positive, HER2 negative, and endocrine therapy can be performed. The second, luminalB type means that ER, PR and HER2 are all positive, endocrine therapy, chemotherapy and targeted therapy can be used, and the therapeutic effect is relatively good. The third type, HER2 overexpression type is HER2 positive, ER and PR are both negative, this type is ineffective for endocrine therapy, and targeted therapy can be used. Fourth, ER, PR and HER2 are all negative , and the treatment effect is the worst. In general, the two subtypes of luminalA and B have higher long-term survival rates. Meanwhile,HER2 overexpression and triple-negative breast cancer have a poor prognosis.

The success of breast cancer treatment depends heavily on tumor estrogen receptor status, which is currently assessed by immunohistochemistry. While immunohistochemistry is well suited to detect primary breast tumors, metastatic foci are less accurate. Estrogen receptor expression changes over time, and inconsistent expression between primary and metastatic tumors has been observed in up to 40% of patients.Studies have shown the potential role of FES-PET/CT in assessing ER status, especially in patients with multiple tumors or that are difficult to biopsy.FES-PET/CT as an imaging technique targeting estrogen receptors may help predict patient response to endocrine therapy. Therefore, FES PET/CT imaging is of great significance for the selection of patients who benefit from endocrine therapy and those who are better through adjuvant chemotherapy .

• Study Type: Observational
• Enrollment (Anticipated): 80

Contacts and Locations

Study Locations

• China
  • Hubei
    • Wuhan, Hubei, China, 430030
      • Recruiting
      • TongjiHospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Probability Sample

Study Population

All patients should be more than 18 years old,and have been pathologically confirmed breast cancer.

Description

Inclusion Criteria:

• More than 18 years old
• Patients with pathologically confirmed breast cancer
• Sign the informed consent form

Exclusion Criteria:

• Pregnant women
• Severe underlying diseases that cannot cooperate with PET examination

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
SUVmax	SUVmax	5 years

Collaborators and Investigators

• Sponsor: Tongji Hospital

Study record dates

Study Major Dates

• Study Start (Actual): December 31, 2021
• Primary Completion (Anticipated): December 31, 2026
• Study Completion (Anticipated): December 31, 2026

Study Registration Dates

• First Submitted: September 12, 2022
• First Submitted That Met QC Criteria: September 12, 2022
• First Posted (Actual): September 15, 2022

Study Record Updates

• Last Update Posted (Actual): September 15, 2022
• Last Update Submitted That Met QC Criteria: September 12, 2022
• Last Verified: September 1, 2022

More Information

Terms related to this study

• Keywords: breast cancer; PET/CT; Estrogen receptor
• Additional Relevant MeSH Terms: Skin Diseases; Neoplasms; Neoplasms by Site; Breast Diseases; Breast Neoplasms; Triple Negative Breast Neoplasms
• Other Study ID Numbers: TJ-IRB20211128

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No