Variance of HRD From Paired Ovarian Cancer

Study Overview
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Brief Summary
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Homologous recombination deficiency (HRD) is an important biomarker of poly (ADP-ribose) polymerase inhibitor (PARPi) in patients with high-grade serous ovarian cancer (HGSOC). The stability of HRD in the recurrent HGSOC and its primary pair remains unknown.

Detailed Description
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This study intends to perform HRD testing of ovarian cancer in the recurrent HGSOC and its primary pair, furtherly correlate HRD status and clinical characteristics in the recurited population.

Official Title
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Variance of HRD From Primary to Recurrent in High-grade Serous Ovarian Cancer

Conditions
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Ovarian Cancer, HRD, Platinum-sensitive Ovarian Cancer

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects join the study voluntarily and sign informed consent; Female subjects are older than 18 years; ECOG(Eastern Cooperative Oncology Group) physical status score is 0-2; Life expectancy≥3 months; Histologically confirmed FIGO(International Federation of Gynecology and Obstetrics ) III/IV ovarian cancer, fallopian tube cancer, or primary peritoneal cancer; Participants must have high-grade serous histology Exclusion Criteria: Personnel involved in the formulation or implementation of the research plan; The subjects had other malignant diseases in past 2 years, except skin squamous cell carcinoma, basal-like carcinoma, breast intraductal carcinoma in situ, or cervical carcinoma in situ;

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Loss of heterozygosity (LOH) score in the primary and recurrent ovarian cancer | The LOH score is a scale describing the genomic loss of heterozygosity status in the primary or recurrent tumor of an ovarian cancer patient. The score is determined by analyzing more than 3500 SNPs spaced at 1Mb intervals across the genome on the FoundationOne CDx test and extrapolating an LOH profile, excluding arm and chromosome-wide LOH segments. The score is summarized as the percentage of the genome with LOH regions. | Through study completion, an average of 1 year] | 
| Homologous recombination deficiency (HRD) status | The HRD status for primary or recurrent tumor in a patient is considered according to the LOH score and genomic mutation status of BRCA1 and BRCA2 genes in the sample. A sample with LOH≥16%，and/or with genomic mutation in BRCA1 or BRCA2 gene, is defined as HRD positive. Otherwise, a sample with LOH<16% and wild type BRCA1/BRCA2 genes is defined as HRD negative. | Through study completion, an average of 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Progression-free survival | Progression-free survival in recruited patients | From the beginning of the patient's onset, an average of 1 year | 
| Overall survival | Overall survival in recruited patients | From the beginning of the patient's onset, an average of 3 year |