1.Pregnancy-associated breast cancer: Management of the mother, fetus and tumour.
Andrea TAN ; Weining WANG ; Cheryl LONG ; Zewen ZHANG ; Joanne NGEOW ; Citra MATTAR
Annals of the Academy of Medicine, Singapore 2025;54(4):235-246
INTRODUCTION:
Pregnancy-associated breast cancer (PABC) is described as breast cancer diagnosed within pregnancy or within 1 year postpartum. PABC is becoming more common due to delayed childbearing, with older maternal age increasing the likelihood of tumorigenesis coinciding with pregnancy. Our review aims to outline the important principles of managing PABC, and discusses future fertility implications, genetic testing and postnatal considera-tions that are not often considered in other existing reviews.
METHOD:
A literature search was conducted using PubMed, Cochrane and Google Scholar databases.
RESULTS:
A persistent breast mass in pregnant women should be evaluated with a breast ultrasound. Total mastectomy is the standard treatment in the first trimester. Chemotherapy is contraindicated in the first trimesters, but can be given in the second and third trimester, and stopped before 35 weeks. Radiotherapy should be delayed until delivery, and hormone receptor therapy is contraindicated in pregnancy. A multidisciplinary team involving an obstetrician, medical oncologist and other allied health professionals is crucial. Delivery should be planned as close to 37 weeks as possible, and at least 3 weeks after the last chemotherapy cycle. Vaginal delivery is preferred, and breastfeeding can resume 14 days after the last chemotherapy regime.
CONCLUSION
A breast mass in a pregnant woman should not be dismissed. PABC must be managed by multidisciplinary teams at tertiary medical centres with access to surgery and chemoradiation therapies. Management strategies must include safe manage-ment and delivery of the fetus, contraception and future fertility planning.
Humans
;
Female
;
Pregnancy
;
Breast Neoplasms/diagnosis*
;
Pregnancy Complications, Neoplastic/diagnosis*
;
Mastectomy
;
Delivery, Obstetric
2.BNT162B2 COVID-19 mRNA vaccination did not promote substantial anti-syncytin-1 antibody production nor mRNA transfer to breast milk in an exploratory pilot study.
Citra N Z MATTAR ; Winston KOH ; Yiqi SEOW ; Shawn HOON ; Aparna VENKATESH ; Pradip DASHRAATH ; Li Min LIM ; Judith ONG ; Rachel LEE ; Nuryanti JOHANA ; Julie S L YEO ; David CHONG ; Lay Kok TAN ; Jerry K Y CHAN ; Mahesh CHOOLANI ; Paul Anantharajah TAMBYAH
Annals of the Academy of Medicine, Singapore 2022;51(5):309-312
3.Pregnancy Outcomes in COVID-19: A Prospective Cohort Study in Singapore.
Citra Nz MATTAR ; Shirin KALIMUDDIN ; Sapna P SADARANGANI ; Shephali TAGORE ; Serene THAIN ; Koh Cheng THOON ; Eliane Y HONG ; Abhiram KANNEGANTI ; Chee Wai KU ; Grace Mf CHAN ; Kelvin Zx LEE ; Jeannie Jy YAP ; Shaun S TAN ; Benedict YAN ; Barnaby E YOUNG ; David C LYE ; Danielle E ANDERSON ; Liying YANG ; Lin Lin SU ; Jyoti SOMANI ; Lay Kok TAN ; Mahesh A CHOOLANI ; Jerry Ky CHAN
Annals of the Academy of Medicine, Singapore 2020;49(11):857-869
INTRODUCTION:
Pregnant women are reported to be at increased risk of severe coronavirus disease 2019 (COVID-19) due to underlying immunosuppression during pregnancy. However, the clinical course of COVID-19 in pregnancy and risk of vertical and horizontal transmission remain relatively unknown. We aim to describe and evaluate outcomes in pregnant women with COVID-19 in Singapore.
METHODS:
Prospective observational study of 16 pregnant patients admitted for COVID-19 to 4 tertiary hospitals in Singapore. Outcomes included severe disease, pregnancy loss, and vertical and horizontal transmission.
RESULTS:
Of the 16 patients, 37.5%, 43.8% and 18.7% were infected in the first, second and third trimesters, respectively. Two gravidas aged ≥35 years (12.5%) developed severe pneumonia; one patient (body mass index 32.9kg/m2) required transfer to intensive care. The median duration of acute infection was 19 days; one patient remained reverse transcription polymerase chain reaction (RT-PCR) positive >11 weeks from diagnosis. There were no maternal mortalities. Five pregnancies produced term live-births while 2 spontaneous miscarriages occurred at 11 and 23 weeks. RT-PCR of breast milk and maternal and neonatal samples taken at birth were negative; placenta and cord histology showed non-specific inflammation; and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-specific immunoglobulins were elevated in paired maternal and umbilical cord blood (n=5).
CONCLUSION
The majority of COVID-19 infected pregnant women had mild disease and only 2 women with risk factors (obesity, older age) had severe infection; this represents a slightly higher incidence than observed in age-matched non-pregnant women. Among the women who delivered, there was no definitive evidence of mother-to-child transmission via breast milk or placenta.
Abortion, Spontaneous/epidemiology*
;
Adult
;
COVID-19/transmission*
;
COVID-19 Nucleic Acid Testing
;
COVID-19 Serological Testing
;
Cohort Studies
;
Disease Transmission, Infectious/statistics & numerical data*
;
Female
;
Fetal Blood/immunology*
;
Humans
;
Infectious Disease Transmission, Vertical/statistics & numerical data*
;
Live Birth/epidemiology*
;
Maternal Age
;
Milk, Human/virology*
;
Obesity, Maternal/epidemiology*
;
Placenta/pathology*
;
Pregnancy
;
Pregnancy Complications, Infectious/physiopathology*
;
Pregnancy Outcome/epidemiology*
;
Pregnancy Trimester, First
;
Pregnancy Trimester, Second
;
Prospective Studies
;
RNA, Viral/analysis*
;
Risk Factors
;
SARS-CoV-2
;
Severity of Illness Index
;
Singapore/epidemiology*
;
Umbilical Cord/pathology*
;
Young Adult
4.Early initiation and regular breast milk expression reduces risk of lactogenesis II delay in at-risk Singaporean mothers in a randomised trial.
Doris FOK ; Izzuddin Mohd ARIS ; Jiahui HO ; Yiong-Huak CHAN ; Mary RAUFF ; James KC LUI ; Mark D CREGAN ; Peter HARTMANN ; Yap Seng CHONG ; Citra NZ MATTAR
Singapore medical journal 2019;60(2):80-88
INTRODUCTION:
Lactogenesis II (LaII) failure can be prevented in at-risk mothers with simple proactive interventions. In a randomised trial, we investigated the efficacy of early and regular breast milk expression in establishing LaII, using an electric double-breast pump.
METHODS:
Mothers with uncomplicated singleton deliveries were randomised to intervention (n = 31) or control (n = 29) groups. The former commenced breast milk expression with an electric pump within one hour of delivery and maintained regular expression with direct breastfeeding. Control mothers directly breastfed without regular pump expression. Expressed milk volumes were analysed for citrate, lactose, sodium and protein.
RESULTS:
Median time of LaII was Day 3 (interquartile range [IQR] 1 day) with intervention and on Day 4 (IQR 1 day) among controls (p = 0.03). Biochemical steady-state concentrations were achieved around early Day 4 (sodium, total protein) and Days 4-5 (citrate, lactose). Sodium, protein and lactose levels were similar in both groups over seven days, at 5.80 mM, 0.68 mM and -13.38 mM, respectively. Mean daily milk volume with intervention was 73.9 mL on Day 3 and 225.2 mL on Day 7, greater than controls (25.4 mL on Day 3 and 69.2 mL on Day 7; p < 0.2). Mean infant weights were similar on Day 8 at 3,477 g with intervention and 3,479 g among controls.
CONCLUSION
LaII is established by postnatal Day 3 with early initiation of regular breast milk expression, a useful intervention for mothers at risk of early-onset breastfeeding failure.
Adult
;
Breast Feeding
;
methods
;
Breast Milk Expression
;
methods
;
Citrates
;
analysis
;
Female
;
Humans
;
Infant Formula
;
Infant, Newborn
;
Lactation
;
physiology
;
Milk, Human
;
chemistry
;
physiology
;
Mothers
;
Proteins
;
analysis
;
Sodium
;
analysis
;
Young Adult
5.Rapid initiation of fetal therapy services with a system of learner-centred training under proctorship: the National University Hospital (Singapore) experience.
Arundhati GOSAVI ; Pradip D VIJAYAKUMAR ; Bryan Sw NG ; May-Han LOH ; Lay Geok TAN ; Nuryanti JOHANA ; Yi Wan TAN ; Dedy SANDIKIN ; Lin Lin SU ; Tuangsit WATAGANARA ; Arijit BISWAS ; Mahesh A CHOOLANI ; Citra Nz MATTAR
Singapore medical journal 2017;58(6):311-320
INTRODUCTIONManagement of complicated monochorionic twins and certain intrauterine structural anomalies is a pressing challenge in communities that still lack advanced fetal therapy. We describe our efforts to rapidly initiate selective feticide using radiofrequency ablation (RFA) and selective fetoscopic laser photocoagulation (SFLP) for twin-to-twin transfusion syndrome (TTTS), and present the latter as a potential model for aspiring fetal therapy units.
METHODSFive pregnancies with fetal complications were identified for RFA. Three pregnancies with Stage II TTTS were selected for SFLP. While RFA techniques utilising ultrasonography skills were quickly mastered, SFLP required stepwise technical learning with an overseas-based proctor, who provided real-time hands-off supervision.
RESULTSAll co-twins were live-born following selective feticide; one singleton pregnancy was lost. Fetoscopy techniques were learned in a stepwise manner and procedures were performed by a novice team of surgeons under proctorship. Dichorionisation was completed in only one patient. Five of six twins were live-born near term. One pregnancy developed twin anaemia-polycythaemia sequence, while another was complicated by co-twin demise.
DISCUSSIONProctor-supervised directed learning facilitated the rapid provision of basic fetal therapy services by our unit. While traditional apprenticeship is important for building individual expertise, this system is complementary and may benefit other small units committed to providing these services.
6.Care of women in menopause: sexual function, dysfunction and therapeutic modalities.
Citra Nurfarah MATTAR ; Yap Seng CHONG ; Lin Lin SU ; Anupriya Aditya AGARWAL ; P C WONG ; Mahesh CHOOLANI
Annals of the Academy of Medicine, Singapore 2008;37(3):215-223
INTRODUCTIONThe physiological changes that occur in menopause alter sexual function and affect well-being. Hormonal changes contribute significantly to reduced sexual function in older women and sexual dysfunction may well be amenable to treatment with exogenous hormones or other agents.
MATERIALS AND METHODSRelevant clinical studies were identified by a computerised literature search. The collated data were presented to fellow gynaecologists for review, analysis of results and discussion in a series of meetings dedicated to finding the best evidence in menopause management. The evidence was assessed and used to prepare guidelines around the management of women who are affected by sexual dysfunction in menopause.
RESULTSHormone therapy benefits many women who have dyspareunia related to vaginal atrophy, reduced libido and decreased satisfaction, particularly if these symptoms adversely affect their quality of life. Alternative agents such as tibolone and sildenafil citrate can be useful adjuncts.
CONCLUSIONSIt is increasingly important to recognise postmenopausal sexual dysfunction. Treatment of this syndrome must be individualised to the specific complaints of each woman. Hormones and other agents are relevant treatment options for properly-selected women.
Female ; Humans ; Menopause ; Sexual Dysfunction, Physiological ; etiology ; therapy ; Sexual Dysfunctions, Psychological ; etiology ; therapy
7.An unexpected presentation of endometriosis--a "parasitic" cyst of the bowel in a menopausal woman on hormone therapy.
Citra Nurfarah MATTAR ; Brendan PANG ; Yoke Fai FONG
Annals of the Academy of Medicine, Singapore 2008;37(1):69-71
INTRODUCTIONThis report describes a "parasitic" endometriotic cyst of the small bowel.
CLINICAL PICTUREA menopausal woman with a pelvic mass presenting years after commencing hormone therapy.
TREATMENTWe performed laparoscopic excision of a cystic tumour attached to the small bowel with a solitary vascular pedicle.
OUTCOMEHistology confirmed it to be an endometriotic cyst of ovarian origin, probably resulting from spillage during previous surgery and reactivation with hormone therapy.
CONCLUSIONSWe discuss the possible aetiology of this unusual presentation of endometriosis and review the literature on parasitic gynaecological tumours.
Cysts ; pathology ; Endometriosis ; diagnosis ; etiology ; Estrogen Replacement Therapy ; Female ; Genital Diseases, Female ; Humans ; Intestine, Small ; physiopathology ; Middle Aged
8.Menopause, hormone therapy and cardiovascular and cerebrovascular disease.
Citra Nurfarah MATTAR ; Lubna HARHARAH ; Lin Lin SU ; Anupriya Aditya AGARWAL ; P C WONG ; Mahesh CHOOLANI
Annals of the Academy of Medicine, Singapore 2008;37(1):54-62
INTRODUCTIONCardiovascular disease is the leading cause of death and morbidity among postmenopausal women, and oestrogen deficiency may be an important factor in its development. The role of oestrogen replacement in preventing cardiovascular disease is controversial. The aim of this descriptive review is to analyse the available data and to recommend evidence-based practice guidelines pertaining to hormone therapy in the context of cardiovascular and cerebrovascular health.
MATERIALS AND METHODSRelevant clinical trials were identified by computerised literature search. The collated data were presented to fellow gynaecologists for review, analysis of results and discussion in a series of meetings dedicated to finding the best evidence in menopause management. The evidence was used to formulate clinical practice guidelines for the management of women with significant cardiovascular risk factors.
RESULTSEvidence from animal studies and observational trials supported a cardio-protective effect of postmenopausal hormone therapy. More recent randomised clinical trial data have shown no significant reduction of coronary heart disease, and have confirmed a higher incidence of stroke and venous thromboembolism.
CONCLUSIONSThe evidence is widely divergent regarding postmenopausal hormone therapy and cardiovascular risk. More consistent data are available reporting an increased risk in the incidence of venous thromboembolism and stroke. It is important to be clear about the indications of hormone use and to utilise alternative modalities to promote cardiovascular health in the postmenopausal population.
Aged ; Cardiovascular Diseases ; prevention & control ; Cerebrovascular Disorders ; prevention & control ; Estrogens ; deficiency ; metabolism ; Female ; Hormone Replacement Therapy ; Humans ; Menopause ; Middle Aged ; Practice Guidelines as Topic

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