Molecular Genetic Basis of Invasive Breast Cancer Risk Associated With Lobular Carcinoma in Situ

Completed

• Conditions: Breast Cancer; Lobular Carcinoma; Invasive Breast Cancer
• Interventions: Other: Tissue specimen

• Registration Number: NCT00581750
• Lead Sponsor: Memorial Sloan Kettering Cancer Center

Brief Summary

This study is being done in order to better understand the biology of an abnormal lesion found in breast tissue called "lobular carcinoma in situ" (LCIS). We are interested in studying LCIS. The LCIS is not a cancer itself, but is a marker for an increased risk of cancer. We would like to look for LCIS in breast tissue removed during surgery from patients with cancer or at high risk for cancer. If LCIS is found, we will search for genes that are expressed (turned on or off) differently than in normal breast tissue. The identification of such genes would help us better understand the biology of LCIS, and its possible relationship to breast cancer.

Detailed Description

LCIS) is a monoclonal pathologic entity which is subject to characterization at the molecular genetic level, and that these molecular genetic alterations may be used to predict the subsequent development of invasive breast cancer. Prophylactic mastectomy specimens from women with multifocal LCIS, and invasive breast cancer specimens which display coexisting LCIS, will be examined for X-chromosome inactivation patterns and loss of heterozygosity to assess for monoclonality. If clonality is present, we will assess for microsatellite instability, and a microarray-based comparative genomic hybridization (CGH) technique will be used to identify genetic alterations present in LCIS. Lastly, LCIS biopsy specimens from untreated patients who, after follow-up did or did not develop invasive breast cancer, will be evaluated to determine whether the nature or extent of any identified genetic alterations can be correlated with the subsequent development of invasive breast cancer. We hypothesize that a fraction of LCIS lesions will reflect a monoclonal origin, that those lesions of monoclonal origin will display evidence of specific molecular genetic alterations, and that these specific alterations will correlate with the likelihood of the subsequent development of invasive breast carcinoma.

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study Start: 2001-10
• Study First Submitted: 2007-12-21
• Study First Submitted QC: 2007-12-21
• Study First Posted: 2007-12-28
• Status Verified: 2021-06
• Primary Completion: 2021-06-28
• Study Completion: 2021-06-28
• Last Update Submitted: 2021-06-30
• Last Update Posted: 2021-07-02

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 550

Inclusion Criteria

• multifocal lobular carcinoma in situ treated with prophylactic mastectomy or lumpectomy
• invasive breast cancer (lobular or ductal) with coexisting lobular carcinoma in situ treated with mastectomy or lumpectomy
• biopsy proven, untreated lobular carcinoma in situ
• invasive lobular cancer with or without coexisting lobular carcinoma in situ treated with mastectomy or lumpectomy

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Exclusion Criteria

• no paraffin blocks available
• no residual lobular carcinoma in situ in paraffin blocks

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Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
LCIS diagnosis	Tissue specimen	Patient with LCIS diagnosis

Primary Outcome Measures

Name	Time	Method
To perform analyses using microarray-based gene expression profiling to determine whether a unique mRNA and microRNA gene expression profile distinguishes LCIS from normal breast epithelium and from invasive carcinoma.	2 years

Secondary Outcome Measures

Name	Time	Method
Deter the nature or extent of molecular genetic alterations in LCIS as asses by mRNA & microRNA microarray canbe correl with the risk of subsequent invas breast cancer in pts with class type LCIS & those with newly described histologic variants of LCIS.	2 years
To perform analyses using microarray-based mRNA and microRNA gene expression profiling to identify distinct molecular subtypes within LCIS.	2 years
To prospectively follow patients diagnosed with newly described histologic variants of lobular carcinoma in situ, who do or do not undergo surgery for treatment or prevention, to better characterize this lesion and its behavior.	2 years
To further characterize the invasive lobular breast cancers that develop in association with LCIS as assessed by standard histopathology and immunohistochemistry.	2 years

Trial Locations

Locations (1)

Memorial Sloan Kettering Cancer Center; 🇺🇸 New York, New York, United States