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Londero AP, Bertozzi S, Xholli A, Cedolini C, Cagnacci A. Breast cancer and the steadily increasing maternal age: are they colliding? BMC Womens Health 2024; 24:286. [PMID: 38745181 PMCID: PMC11092140 DOI: 10.1186/s12905-024-03138-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 05/08/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND Pregnancy-related cancers are mostly breast cancers, and their incidence is likely to increase as a result of the modern trend of delaying childbearing. In particular, advanced maternal age increases breast cancer risk, and younger breast cancer patients are more likely to die and metastasize. This study compared a population with a high incidence of delayed childbearing with another population with a lower mean age at childbirth in order to determine whether breast cancer diagnosis and childbearing age overlap. METHODS We retrospectively analyzed multiple data sources. The Surveillance, Epidemiology, and End Results (SEER) program, the United States National Center for Health Statistics as part of the National Vital Statistics System, the United Nations Population Division, the GLOBOCAN Cancer Observatory, the CLIO-INFRA project database, the Human Fertility Database, and anonymized local data were used. RESULTS As women's age at delivery increased, the convergence between their age distribution at breast cancer diagnosis and childbearing increased. In addition, the overlap between the two age distributions increased by more than 200% as the average age at delivery increased from 27 to 35 years. CONCLUSIONS As women's average childbearing age has progressively risen, pregnancy and breast cancer age distributions have significantly overlapped. This finding emphasizes the need for increased awareness and educational efforts to inform women about the potential consequences of delayed childbearing. By providing comprehensive information and support, women can make more informed decisions about their reproductive health and cancer prevention strategies.
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Affiliation(s)
- Ambrogio P Londero
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Infant Health, University of Genoa, Largo Rosanna Benzi, 10, Genoa, 16132, Italy.
- Obstetrics and Gynecology Unit, IRCCS Istituto Giannina Gaslini, Via Gerolamo Gaslini, 5, Genoa, 16147, Italy.
| | - Serena Bertozzi
- Breast Unit, University Hospital of Udine, Udine, 33100, Italy
- Ennergi Research (Non-Profit Organisation), Lestizza, 33050, Italy
| | - Anjeza Xholli
- Academic Unit of Obstetrics and Gynecology, IRCCS Ospedale San Martino, Genoa, 16132, Italy
| | - Carla Cedolini
- Breast Unit, University Hospital of Udine, Udine, 33100, Italy
- Ennergi Research (Non-Profit Organisation), Lestizza, 33050, Italy
| | - Angelo Cagnacci
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Infant Health, University of Genoa, Largo Rosanna Benzi, 10, Genoa, 16132, Italy
- Academic Unit of Obstetrics and Gynecology, IRCCS Ospedale San Martino, Genoa, 16132, Italy
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Abrar SS, Bachok N. Systematic Review of Survival Outcomes of Pregnancy-Associated Breast Cancer in Asian Countries. Malays J Med Sci 2024; 31:6-17. [PMID: 38694578 PMCID: PMC11057829 DOI: 10.21315/mjms2024.31.2.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 09/29/2023] [Indexed: 05/04/2024] Open
Abstract
Pregnancy-associated breast cancer (PABC) is a rare type of gestational cancer. It poses a significant challenge in diagnosis and management, especially in Asian countries with limited resources. We carried out a systematic literature review and narrative synthesis to identify survival outcomes for women with PABC in Asia. We searched MEDLINE, PubMed, Cochrane Library and the reference lists of the included English language articles for those conducted between January 2010 and August 2022. The search terms were pregnancy-associated breast cancer, breast cancer AND pregnancy, survival of PABC and prognosis of PABC patients. PABC is defined as breast cancer diagnosed either during pregnancy or 1 year-5 years postpartum. This review included observational studies conducted in Asian countries. The final 11 articles met the selection criteria and were analysed. Five of the studies had high quality methods as assessed using the Joanna Briggs Institute (JBI) checklist. We reported study design, year of diagnosis, country, definition of PABC, control group, age of participants, median follow-up time, survival outcomes and pregnancy as prognostic factors. Only five studies reported that PABC patients had a poor overall or disease-free survival rate compared to the control. Pregnancy was a significant independent prognostic factor of breast cancer in only two studies. This review highlights that pregnancy has an unconfirmed association with breast cancer survival in Asia. Most studies that found a non-significant association had small samples, thus there is a need for large-scale multinational epidemiological studies in Asia to establish the survival outcomes in PABC patients.
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Affiliation(s)
- Syed Sana Abrar
- Unit of Biostatistics and Research Methodology, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Norsa'adah Bachok
- Unit of Biostatistics and Research Methodology, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
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3
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Abrar SS, Norsa'adah B, Yahya MM, Isa JA, Zon EM. Survival probabilities and prognostic factors of pregnancy-associated breast cancer in Malaysian women. Obstet Gynecol Sci 2024; 67:76-85. [PMID: 37985950 DOI: 10.5468/ogs.23151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 10/13/2023] [Indexed: 11/22/2023] Open
Abstract
OBJECTIVE Pregnancy-associated breast cancer (PABC) is a rare cancer. This study aimed to determine the survival probabilities and prognostic factors in patients with PABC. METHODS A retrospective cohort study was conducted in two tertiary care hospitals in Kota Bharu. We included all patients with breast cancer who were diagnosed by histopathology while pregnant or within 2 years post-partum from 2001 through 2020. We matched patients with PABC to non-pregnant patients with breast cancer by age and year of diagnosis. The data were analyzed using Cox proportional hazard regression. RESULTS A total of 35 cases of PABC and 70 non-PABC controls were recruited. The 3-year, 5-year, and 10-year survival probabilities for patients with PABC were 58.6%, 47.54%, and 38.03%, respectively. The patients with PABC had a non-significant difference in survival probabilities compared with non-PABC patients. The significant prognostic factors of PABC were age (adjusted hazard ratio [aHR], 0.91; 95% confidence interval [CI], 0.86-0.96; P=0.001), advanced stage of cancer (aHR, 9.97; 95% CI, 3.96-25.2; P<0.001), and no surgery (aHR, 3.16; 95% CI, 1.01-9.85; P=0.047). Pregnancy was not found to be an independent factor in the prognosis of PABC (aHR, 0.72; 95% CI, 0.39-1.28; P=0.266). CONCLUSION Women diagnosed with PABC had similar survival probabilities compared with non-PABC patients. Pregnancy was not an independent prognostic factor for breast cancer. This information can be useful when women with breast cancer are counseled and supported with the option of beginning treatment with pregnancy continuation.
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Affiliation(s)
- S S Abrar
- Unit of Biostatistics and Research Methodology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Malaysia
| | - Bachok Norsa'adah
- Unit of Biostatistics and Research Methodology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Malaysia
| | - Maya Mazuwin Yahya
- Universiti Sains Malaysia Hospital, Kota Bharu, Malaysia
- Department of Surgery, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Malaysia
| | - Junaidi A Isa
- Department of Surgery, Raja Perempuan Zainab II Hospital, Kota Bharu, Malaysia
| | - Erinna M Zon
- Universiti Sains Malaysia Hospital, Kota Bharu, Malaysia
- Department of Obstetrics & Gynaecology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Malaysia
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4
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Abrar SS, Norsa'adah B. Poor survival rate of pregnancy-associated breast cancer in Asian countries. ANNALS OF THE ACADEMY OF MEDICINE, SINGAPORE 2023; 52:271-272. [PMID: 38904525 DOI: 10.47102/annals-acadmedsg.2022423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Affiliation(s)
- S S Abrar
- Biostatistics and Research Methodology Unit, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Bachok Norsa'adah
- Biostatistics and Research Methodology Unit, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
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Oprean CM, Ciocoiu AD, Segarceanu NA, Moldoveanu D, Stan A, Hoinoiu T, Chiorean-Cojocaru I, Grujic D, Stefanut A, Pit D, Dema A. Pregnancy in a Young Patient with Metastatic HER2-Positive Breast Cancer-Between Fear of Recurrence and Desire to Procreate. Curr Oncol 2023; 30:4833-4843. [PMID: 37232822 DOI: 10.3390/curroncol30050364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/01/2023] [Accepted: 05/06/2023] [Indexed: 05/27/2023] Open
Abstract
Breast cancer is the most frequent neoplasm among women and the second leading cause of death by cancer. It is the most frequent cancer diagnosed during pregnancy. Pregnancy-associated breast cancer is defined as breast cancer that is diagnosed during pregnancy and/or in the postpartum period. Data about young women with metastatic HER2-positive cancer who desire a pregnancy are scarce. The medical attitude in these clinical situations is difficult and nonstandardized. We present the case of a 31-year-old premenopausal woman diagnosed in December 2016 with a stage IV Luminal HER2-positive metastatic breast cancer (pT2 N0 M1 hep). The patient was initially treated by surgery in a conservative manner. Postoperatively, the presence of liver metastases was found by CT investigation. Consequently, line I treatment (docetaxel l75 mg/m² iv; trastuzumab 600 mg/5 mL sq) and ovarian drug suppression (Goserelin 3.6 mg sq at 28 days) was administered. After nine cycles of treatment, the patient's liver metastases had a partial response to the therapy. Despite having a favorable disease evolution and a strong desire to procreate, the patient vehemently refused to continue any oncological treatment. The psychiatric consult highlighted an anxious and depressive reaction for which individual and couple psychotherapy sessions were recommended. After 10 months from the interruption of the oncological treatment, the patient appeared with an evolving pregnancy of 15 weeks. An abdominal ultrasound revealed the presence of multiple liver metastases. Knowing all the possible effects, the patient consciously decided to postpone the proposed second-line treatment. In August 2018, the patient was admitted in the emergency department with malaise, diffuse abdominal pain and hepatic failure. Abdominal ultrasound found a 21-week-old pregnancy which had stopped in evolution, multiple liver metastases and ascites in large quantity. She was transferred to the ICU department where she perished just a few hours later. Conclusions/Discussion: From a psychological standpoint, the patient had an emotional hardship to make the transition from the status of a healthy person to the status of a sick person. Consequently, she entered a process of emotional protection of the positive cognitive distortion type, which favored the decision to abandon treatment and try to complete the pregnancy to the detriment of her own survival. The patient delayed the initiation of oncological treatment in pregnancy until it was too late. The consequence of this delay in treatment led to the death of the mother and fetus. A multidisciplinary team worked to provide this patient with the best medical care and psychological assistance throughout the course of the disease.
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Affiliation(s)
- Cristina Marinela Oprean
- ANAPATMOL Research Center, 'Victor Babes' University of Medicine and Pharmacy of Timisoara, 300041 Timisoara, Romania
- Department of Oncology, ONCOHELP Hospital Timisoara, Ciprian Porumbescu Street, No. 59, 300239 Timisoara, Romania
- Department of Oncology, ONCOMED Outpatient Unit, Ciprian Porumbescu Street, No. 59, 300239 Timisoara, Romania
| | - Andrei Dorin Ciocoiu
- Department of Oncology, ONCOHELP Hospital Timisoara, Ciprian Porumbescu Street, No. 59, 300239 Timisoara, Romania
| | - Nusa Alina Segarceanu
- Department of Oncology, ONCOHELP Hospital Timisoara, Ciprian Porumbescu Street, No. 59, 300239 Timisoara, Romania
- Department of Oncology, ONCOMED Outpatient Unit, Ciprian Porumbescu Street, No. 59, 300239 Timisoara, Romania
| | - Diana Moldoveanu
- Department of Oncology, ONCOHELP Hospital Timisoara, Ciprian Porumbescu Street, No. 59, 300239 Timisoara, Romania
- Department of Oncology, ONCOMED Outpatient Unit, Ciprian Porumbescu Street, No. 59, 300239 Timisoara, Romania
| | - Alexandra Stan
- Department of Oncology, City Clinical Emergency Hospital of Timisoara, Victor Babes Blvd. No. 22, 300595 Timisoara, Romania
| | - Teodora Hoinoiu
- Department of Clinical Practical Skills, "Victor Babes" University of Medicine and Pharmacy, Eftimie Murgu Sq. Nr. 2, 300041 Timisoara, Romania
- Center for Advanced Research in Cardiovascular Pathology and Hemostaseology, "Victor Babes" University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Ioana Chiorean-Cojocaru
- Department of Obstetrics and Gynaecology, Faculty of Medicine and Pharmacy, "Victor Babes" University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Daciana Grujic
- Department of Plastic and Reconstructive Surgery, "Victor Babes" University of Medicine and Pharmacy, Eftimie Murgu Sq. Nr. 2, 300041 Timisoara, Romania
| | - Adelina Stefanut
- Department of Psichology & Sociology, West University, Timisora, Blvd. No. 4, Vasile Pârvan, 300223 Timisoara, Romania
| | - Daniel Pit
- Center for Advanced Research in Cardiovascular Pathology and Hemostaseology, "Victor Babes" University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Alis Dema
- ANAPATMOL Research Center, 'Victor Babes' University of Medicine and Pharmacy of Timisoara, 300041 Timisoara, Romania
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Rauh-Hain JA, Zubizarreta J, Nitecki R, Melamed A, Fu S, Jorgensen K, Brady PC, Baker VL, Chavez-MacGregor M, Giordano SH, Keating NL. Survival outcomes following pregnancy or assisted reproductive technologies after breast cancer: A population-based study. Cancer 2022; 128:3243-3253. [PMID: 35767282 PMCID: PMC9378486 DOI: 10.1002/cncr.34371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/16/2022] [Accepted: 05/27/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND This study sought to determine the impact of pregnancy or assisted reproductive technologies (ART) on breast-cancer-specific survival among breast cancer survivors. METHODS The authors performed a cohort study using a novel data linkage from the California Cancer Registry, the California birth cohort, and the Society for Assisted Reproductive Technology Clinic Outcome Reporting System data sets. They performed risk-set matching in women with stages I-III breast cancer diagnosed between 2000 and 2012. For each pregnant woman, comparable women who were not pregnant at that point but were otherwise similar based on observed characteristics were matched at the time of pregnancy. After matching, Cox proportional hazards models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for the association of pregnancy with breast-cancer-specific survival. We repeated these analyses for women who received ART. RESULTS Among 30,021 women with breast cancer, 553 had a pregnancy and 189 attempted at least one cycle of ART. In Cox proportional hazards modeling, the pregnancy group had a higher 5-year disease-specific survival rate; 95.6% in the pregnancy group and 90.6% in the nonpregnant group (HR, 0.43; 95% CI, 0.24-0.77). In women with hormone receptor-positive cancer, we found similar results (HR, 0.43; 95% CI, 0.2-0.91). In the ART analysis, there was no difference in survival between groups; the 5-year disease-specific survival rate was 96.9% in the ART group and 94.1% in the non-ART group (HR, 0.44; 95% CI, 0.17-1.13). CONCLUSION Pregnancy and ART are not associated with worse survival in women with breast cancer. LAY SUMMARY We sought to determine the impact of pregnancy or assisted reproductive technologies (ART) among breast cancer survivors. We performed a study of 30,021 women by linking available data from California and the Society for Assisted Reproductive Technology Clinic Outcome Reporting System. For each pregnant woman, we matched at the time of pregnancy comparable women who were not pregnant at that point but were otherwise similar based on observed characteristics. We repeated these analyses for women who received ART. We found that pregnancy and ART were not associated with worse survival.
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Affiliation(s)
- J. Alejandro Rauh-Hain
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Division of Cancer Prevention and Population Sciences, Department of Health Services Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jose Zubizarreta
- Department of Health Care Policy, Harvard Medical School, Boston, MA, United States
- Department of Biostatistics, Harvard School of Public Health, Boston, MA, United States
| | - Roni Nitecki
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Alexander Melamed
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, United States
| | - Shuangshuang Fu
- Division of Cancer Prevention and Population Sciences, Department of Health Services Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Kirsten Jorgensen
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Paula C. Brady
- Division of Reproductive Endocrinology, Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, NY, United States
| | - Valerie L. Baker
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Johns Hopkins University, Baltimore, MD, United States
| | - Mariana Chavez-MacGregor
- Division of Cancer Prevention and Population Sciences, Department of Health Services Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Sharon H. Giordano
- Division of Cancer Prevention and Population Sciences, Department of Health Services Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Nancy L. Keating
- Department of Health Care Policy, Harvard Medical School, Boston, MA, United States
- Department of Medicine, Brigham and Women’s Hospital, Boston, MA, United States
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7
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Suelmann BBM, Bakhuis CFJ, van Dooijeweert C, Verloop J, Zweemer R, Linn S, van der Wall E, van Diest PJ. Prognosis of pregnancy-associated breast cancer: inferior outcome in patients diagnosed during second and third gestational trimesters and lactation. Breast Cancer Res Treat 2022; 192:175-189. [PMID: 35039951 DOI: 10.1007/s10549-021-06471-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 12/01/2021] [Indexed: 12/24/2022]
Abstract
PURPOSE Pregnancy-associated breast cancer, although most commonly defined as breast cancer diagnosed during pregnancy or ≤1 year following delivery, knows a variety of definitions, likely related to the diversity of reported clinicopathological features and prognosis. More insight into the different breast cancer subgroups during pregnancy, time after delivery and the postpartum period is therefore warranted. METHODS Patients with breast cancer diagnosed during pregnancy or ≤6 months postdelivery were included, and subdivided according to gestational trimester, and postpartum patients according to lactational status. Subgroups were compared to matched non-PABC patients, to investigate the influence of pregnancy and lactation on clinical course and outcome. RESULTS Overall, 662 PABC patients were included (median age 34 years, median follow-up 6.5 years). PABC patients showed an advanced stage at diagnosis and an inferior 5-years-OS (75.4% vs. 83.2%, p = 0.000) compared to 1392 matched non-PABC patients. In subgroup analysis, first trimester PABC patients showed a significantly lower tumor size and stage as compared to other trimesters. Patients diagnosed during the first trimester and postpartum non-lactating patients had a relatively good OS (81.3% and 77.9%, respectively) versus patients diagnosed during the second and third trimesters and during lactation (OS 60.0%, 64.9% and 65.6%, respectively, p = 0.003). CONCLUSION In this large (uniquely specified) PABC cohort, an inferior outcome was found for patients diagnosed within the second and third gestational trimesters and during lactation. These findings indicate that PABC is clinically a heterogeneous group of breast cancer patients that should be redefined based on trimester of diagnosis and lactational status.
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Affiliation(s)
- B B M Suelmann
- Department of Medical Oncology, University Medical Center Utrecht, PO Box 95500, 2509 GA, Utrecht, The Netherlands.
| | - C F J Bakhuis
- Department of Medical Oncology, University Medical Center Utrecht, PO Box 95500, 2509 GA, Utrecht, The Netherlands
| | - C van Dooijeweert
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - J Verloop
- Department of Breast Cancer Research, Netherlands Comprehensive Cancer Organization (IKNL), Utrecht, The Netherlands
| | - R Zweemer
- Department of Gynecological Oncology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - S Linn
- Department of Medical Oncology, Netherlands Cancer Institute (AVL-NKI), Amsterdam, The Netherlands
| | - E van der Wall
- Department of Medical Oncology, University Medical Center Utrecht, PO Box 95500, 2509 GA, Utrecht, The Netherlands
| | - P J van Diest
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
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Zhang M, Zhou J, Wang L. Breast cancer and pregnancy: Why special considerations prior to treatment are needed in multidisciplinary care. Biosci Trends 2021; 15:276-282. [PMID: 34556594 DOI: 10.5582/bst.2021.01187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Breast cancer diagnosed during pregnancy poses ethical and professional challenges. Clinical management of that condition should ensure the safety of both the mother and fetus. Clinical trials on breast cancer exclude pregnant women, so sufficient evidence with which to formulate guidelines for the management of these patients is lacking. Failing to undergo a breast examination during pregnancy, breast symptoms explained by physiological changes such as pregnancy, and unnecessary abortions after the diagnosis of breast cancer lead to worse outcomes for these patients. Multidisciplinary teams including breast surgeons, obstetricians, radiologists, pathologists, and anesthesiologists need to make an early diagnosis and comprehensively evaluate patients in different gestational weeks and with different stages of breast cancer in order to optimize outcomes.
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Affiliation(s)
- Mingdi Zhang
- Department of Breast Surgery, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Jing Zhou
- Laboratory for Reproductive Immunology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China.,The Academy of Integrative Medicine of Fudan University, Shanghai, China.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases, Shanghai, China
| | - Ling Wang
- Laboratory for Reproductive Immunology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China.,The Academy of Integrative Medicine of Fudan University, Shanghai, China.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases, Shanghai, China
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9
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Shao C, Yu Z, Xiao J, Liu L, Hong F, Zhang Y, Jia H. Prognosis of pregnancy-associated breast cancer: a meta-analysis. BMC Cancer 2020; 20:746. [PMID: 32778072 PMCID: PMC7418189 DOI: 10.1186/s12885-020-07248-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 08/03/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Pregnancy-associated breast cancer (PABC) is defined as breast cancer that is diagnosed during pregnancy and/or the postpartum period. Definitions of the duration of the postpartum period have been controversial, and this variability may lead to diverse results regarding prognosis. Moreover, evidence on the dose-response association between the time from the last pregnancy to breast cancer diagnosis and overall mortality has not been synthesized. METHODS We systematically searched PubMed, Embase, and the Cochrane Library for observational studies on the prognosis of PABC published up to June 1, 2019. We estimated summary-adjusted hazard ratios (HRs) and the corresponding 95% confidence intervals (CIs). Subgroup analyses based on diagnosis time, PABC definition, geographic region, year of publication and estimation procedure for HR were performed. Additionally, dose-response analysis was conducted by using the variance weighted least-squares regression (VWLS) trend estimation. RESULTS A total of 54 articles (76 studies) were included in our study. PABC was associated with poor prognosis for overall survival (OS), disease-free survival (DFS) and cause-specific survival (CSS), and the pooled HRs with 95% CIs were 1.45 (1.30-1.63), 1.39 (1.25-1.54) and 1.40 (1.17-1.68), respectively. The corresponding reference category was non-PABC patients. According to subgroup analyses, the varied definition of PABC led to diverse results. The dose-response analysis indicated a nonlinear association between the time from the last delivery to breast cancer diagnosis and the HR of overall mortality (P < 0.001). Compared to nulliparous women, the mortality was almost 60% higher in women with PABC diagnosed at 12 months after the last delivery (HR = 1.59, 95% CI 1.30-1.82), and the mortality was not significantly different at 70 months after the last delivery (HR = 1.14, 95% CI 0.99-1.25). This finding suggests that the definition of PABC should be extended to include patients diagnosed up to approximately 6 years postpartum (70 months after the last delivery) to capture the increased risk. CONCLUSION This meta-analysis suggests that PABC is associated with poor prognosis, and the definition of PABC should be extended to include patients diagnosed up to approximately 6 years postpartum.
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Affiliation(s)
- Chunchun Shao
- Center of Evidence-based Medicine, Institute of Medical Sciences, The Second Hospital of Shandong University, Jinan, 250033 Shandong PR China
| | - Zhigang Yu
- Department of Breast Surgery, The Second Hospital of Shandong University, Jinan, 250033 Shandong PR China
| | - Juan Xiao
- Center of Evidence-based Medicine, Institute of Medical Sciences, The Second Hospital of Shandong University, Jinan, 250033 Shandong PR China
| | - Liyuan Liu
- Department of Breast Surgery, The Second Hospital of Shandong University, Jinan, 250033 Shandong PR China
| | - Fanzhen Hong
- Department of Obstetrics, The Second Hospital of Shandong University, Jinan, 250033 Shandong PR China
| | - Yuan Zhang
- Clinical Epidemiology Unit, Qilu Hospital of Shandong University, Jinan, 250012 Shandong PR China
- Clinical Research Center of Shandong University, Jinan, 250012 Shandong PR China
| | - Hongying Jia
- Center of Evidence-based Medicine, Institute of Medical Sciences, The Second Hospital of Shandong University, Jinan, 250033 Shandong PR China
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