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Conference Paper: Male breast cancer: a comparison between BRCA mutation carriers and non-carriers in Hong Kong, Southern China

TitleMale breast cancer: a comparison between BRCA mutation carriers and non-carriers in Hong Kong, Southern China
Authors
KeywordsMedical sciences
Oncology
Issue Date2012
PublisherAmerican Association for Cancer Research. The Journal's web site is located at http://cancerres.aacrjournals.org/
Citation
The 35th Annual CTRC-AACR Breast Cancer Symposium, San Antonio, TX., 4-8 December 2012. In Cancer Research, 2012, v. 72 n. 24, meeting abstracts, P3-11-02 How to Cite?
AbstractBACKGROUND: Male breast cancer is suggested to be biologically different from female breast cancer. The differences in clinicopathology between male and female breast cancer raise the issues of establishing specific strategies and treatment regime for male breast cancer patients. The single most significant risk factor for male breast cancer is a mutation in the BRCA2 gene. The lack of information on hereditary breast cancer in male, particularly in Asians, leaves great but forgiven research area on epidemiological studies for this group of patients. METHODS: All male breast cancer patients and their family members, from a Hong Kong Hereditary and High Risk Breast Cancer Program since year 2007, were recruited in this study. All received genetic counseling and BRCA mutation testing using DNA extracted from blood samples. A questionnaire was administered at their first visit which included questions on their demographics and socioeconomic status. Other information including family history of breast cancer or other kinds of cancer, method of diagnosis, surgical strategies, pathological results, treatment regime, relapse, metastasis, and outcomes were obtained from their medical records. Descriptive analysis was performed describing the background characteristics. Chi-square test and Student's t-test were applied to calculate the associations between BRCA mutation and risk factors. Survival analysis was performed to look for their survival patterns. RESULTS: Thirty-six male breast cancer patients were recruited between year 2007 and 2012, while 21 were diagnosed before year 2007 (range: 1996 to 2012). Mean, standard deviation, and median follow-up time were 5.75±4.31 and 5.25 years. Seven were found to carry the BRCA mutation. All were BRCA2 mutation and the mutation rate was 19.4% (N = 7). Family history of cancer was found in 52.8% (N = 19). Male BRCA mutation carriers were found to have higher risk of secondary cancer, and their first and second degree family members had higher risk of either breast cancer or other kinds of cancers. T stage in BRCA patients was significantly higher than non-BRCA patients (p = 0.028). All BRCA mutation carriers had ER positive cancers compared with 96.2% who were non-carriers. Half of the male BRCA patients were PR positive compared with higher percentage in non-BRCA patients (50% vs. 80.8%, p = 0.117). Both groups had similar overall (p = 0.962) and disease-free survivals (p = 0.919). The means and standard deviations of 5-year overall survival between BRCA and non-BRCA patients were 2.08±0.25 and 4.24±0.12 years respectively, and 2.08±3.03 and 4.41±1.46 years for disease-free survival. CONCLUSIONS: The prevalence of male breast cancer patients with BRCA2 mutation in Hong Kong is comparable with other similar studies. Male breast cancer patients with BRCA2 mutation are suspected to have higher chance of secondary cancer and familial cancer. Although percentage of ER positive cancers are similar to the two groups, BRCA2 mutation carriers tend to have less PR positive cancers which may suggest a poorer prognosis although due to a small sample size this cannot be shown in this cohort. Further collaborative studies to better understand male breast cancer patients carrying the BRCA mutation is warranted.
DescriptionPoster Session 3 - Treatment: Male Breast Cancer
Persistent Identifierhttp://hdl.handle.net/10722/191216
ISSN
2015 Impact Factor: 8.556
2015 SCImago Journal Rankings: 5.372

 

DC FieldValueLanguage
dc.contributor.authorKwong, A-
dc.contributor.authorChau, WW-
dc.contributor.authorWong, CHN-
dc.contributor.authorLaw, FBF-
dc.contributor.authorNg, EKO-
dc.contributor.authorSuen, DTK-
dc.contributor.authorKurian, AW-
dc.contributor.authorWest, DW-
dc.contributor.authorFord, JM-
dc.contributor.authorMa, ESK-
dc.date.accessioned2013-10-04T01:43:08Z-
dc.date.available2013-10-04T01:43:08Z-
dc.date.issued2012-
dc.identifier.citationThe 35th Annual CTRC-AACR Breast Cancer Symposium, San Antonio, TX., 4-8 December 2012. In Cancer Research, 2012, v. 72 n. 24, meeting abstracts, P3-11-02-
dc.identifier.issn0008-5472-
dc.identifier.urihttp://hdl.handle.net/10722/191216-
dc.descriptionPoster Session 3 - Treatment: Male Breast Cancer-
dc.description.abstractBACKGROUND: Male breast cancer is suggested to be biologically different from female breast cancer. The differences in clinicopathology between male and female breast cancer raise the issues of establishing specific strategies and treatment regime for male breast cancer patients. The single most significant risk factor for male breast cancer is a mutation in the BRCA2 gene. The lack of information on hereditary breast cancer in male, particularly in Asians, leaves great but forgiven research area on epidemiological studies for this group of patients. METHODS: All male breast cancer patients and their family members, from a Hong Kong Hereditary and High Risk Breast Cancer Program since year 2007, were recruited in this study. All received genetic counseling and BRCA mutation testing using DNA extracted from blood samples. A questionnaire was administered at their first visit which included questions on their demographics and socioeconomic status. Other information including family history of breast cancer or other kinds of cancer, method of diagnosis, surgical strategies, pathological results, treatment regime, relapse, metastasis, and outcomes were obtained from their medical records. Descriptive analysis was performed describing the background characteristics. Chi-square test and Student's t-test were applied to calculate the associations between BRCA mutation and risk factors. Survival analysis was performed to look for their survival patterns. RESULTS: Thirty-six male breast cancer patients were recruited between year 2007 and 2012, while 21 were diagnosed before year 2007 (range: 1996 to 2012). Mean, standard deviation, and median follow-up time were 5.75±4.31 and 5.25 years. Seven were found to carry the BRCA mutation. All were BRCA2 mutation and the mutation rate was 19.4% (N = 7). Family history of cancer was found in 52.8% (N = 19). Male BRCA mutation carriers were found to have higher risk of secondary cancer, and their first and second degree family members had higher risk of either breast cancer or other kinds of cancers. T stage in BRCA patients was significantly higher than non-BRCA patients (p = 0.028). All BRCA mutation carriers had ER positive cancers compared with 96.2% who were non-carriers. Half of the male BRCA patients were PR positive compared with higher percentage in non-BRCA patients (50% vs. 80.8%, p = 0.117). Both groups had similar overall (p = 0.962) and disease-free survivals (p = 0.919). The means and standard deviations of 5-year overall survival between BRCA and non-BRCA patients were 2.08±0.25 and 4.24±0.12 years respectively, and 2.08±3.03 and 4.41±1.46 years for disease-free survival. CONCLUSIONS: The prevalence of male breast cancer patients with BRCA2 mutation in Hong Kong is comparable with other similar studies. Male breast cancer patients with BRCA2 mutation are suspected to have higher chance of secondary cancer and familial cancer. Although percentage of ER positive cancers are similar to the two groups, BRCA2 mutation carriers tend to have less PR positive cancers which may suggest a poorer prognosis although due to a small sample size this cannot be shown in this cohort. Further collaborative studies to better understand male breast cancer patients carrying the BRCA mutation is warranted.-
dc.languageeng-
dc.publisherAmerican Association for Cancer Research. The Journal's web site is located at http://cancerres.aacrjournals.org/-
dc.relation.ispartofCancer Research-
dc.subjectMedical sciences-
dc.subjectOncology-
dc.titleMale breast cancer: a comparison between BRCA mutation carriers and non-carriers in Hong Kong, Southern Chinaen_US
dc.typeConference_Paperen_US
dc.identifier.emailKwong, A: avakwong@hku.hk-
dc.identifier.emailChau, WW: jackchau@hku.hk-
dc.identifier.emailWong, CHN: hongnei@hku.hk-
dc.identifier.emailLaw, FBF: fian@pathology.hku.hk-
dc.identifier.emailNg, EKO: ngko@hku.hk-
dc.identifier.emailSuen, DTK: suentkd@hku.hk-
dc.identifier.emailMa, ESK: eskma@hkucc.hku.hk-
dc.identifier.doi10.1158/0008-5472.SABCS12-P3-11-02-
dc.identifier.volume72-
dc.identifier.issue24, meeting abstracts-
dc.publisher.placeUnited States-

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