1.Dilemmas in management of brain tumours in pregnancy.
Pei Shi LEW ; Wei Ching TAN ; Wei Keat TAN ; Hak Koon TAN
Annals of the Academy of Medicine, Singapore 2010;39(1):64-65
Brain Neoplasms
;
radiotherapy
;
Cesarean Section
;
Craniotomy
;
Female
;
Glioblastoma
;
radiotherapy
;
surgery
;
Humans
;
Infant, Newborn
;
Male
;
Patient Care Team
;
Patient Participation
;
Pregnancy
;
Pregnancy Complications, Neoplastic
;
radiotherapy
;
surgery
;
Pregnancy Trimester, Second
;
Radiotherapy, Adjuvant
;
Young Adult
2.Polypoid endometriosis of post vaginal fornix: utility of MRI imaging of pelvis with diffusion weighted imaging for diagnosis
Wei Ping Tham ; Inny Busmanis ; Wei Ching Tan ; Jin Wei Kwek
The Medical Journal of Malaysia 2016;71(3):144-146
Polypoid endometriosis is an uncommon variant of
endometriosis which can mimic malignancy due to its
presentation as masses. We present a case of polypoid
endometriosis which simulated cervical malignancy both on
clinical examination and on computed tomography (CT)
scanning and discuss how magnetic resonance (MR)
imaging, in particular Diffusion Weighted Imaging (DWI), can
help to distinguish this condition from true malignancy and
avoid invasive surgery.
Endometriosis
;
Magnetic Resonance Imaging
3.Placental calcification in pseudoxanthoma elasticum.
Wei Ching TAN ; Charles H RODECK
Annals of the Academy of Medicine, Singapore 2008;37(7):598-600
INTRODUCTIONPseudoxanthoma elasticum (PXE) is an inherited multisystem disorder of the elastic tissue and the objective of this case report is to correlate ultrasonographic and histological appearances of placental calcification in PXE.
CLINICAL PICTUREWe report a case of a 37-year-old white woman with PXE, whose antenatal imaging showed a markedly echogenic placenta due to extensive calcification confirmed on postpartum placental histology.
OUTCOMEThere were no maternal or fetal complications in the antenatal period. A healthy baby of appropriate maturity and weight was delivered via Caesarean section and remained well at 6 months.
CONCLUSIONThe majority of cases of PXE is caused by mutations in the ABCC6 gene. Serious complications in pregnancy can include gastrointestinal haemorrhage, congestive heart failure and cardiac arrhythmia but has not been shown to be associated with markedly increased fetal loss or adverse reproductive outcomes as reported in previous literature. Apart from the cosmetic deterioration of the abdominal skin, there were few serious complications and most have normal pregnancies. Obstetric prognosis is dependent on the vascular damage caused by the illness. There is no basis for advising women with PXE to avoid becoming pregnant, and most pregnancies in PXE are uncomplicated.
Adult ; Calcinosis ; diagnosis ; etiology ; Cesarean Section ; Female ; Humans ; Placenta Diseases ; diagnosis ; etiology ; pathology ; Pregnancy ; Pregnancy Outcome ; Pseudoxanthoma Elasticum ; complications ; diagnosis ; Risk Factors
6.Why we do caesars: a comparison of the trends in caesarean section delivery over a decade.
Candice P Y WANG ; Wei Ching TAN ; Devendra KANAGALINGAM ; Hak Koon TAN
Annals of the Academy of Medicine, Singapore 2013;42(8):408-412
INTRODUCTIONIn the United Kingdom, caesarean section (CS) rates have increased from 9% of deliveries in 1980 to 21% in 2001. A similar increase in CS rates has been seen in many developed countries. This is beyond the World Health Organisation's (WHO's) recommended level of 15%. This is a worrying trend as the risks of placenta previa, placenta accreta, hysterectomies, bladder and bowel injuries are increased with subsequent CS. We aim to ascertain the commonest indications for CS in a tertiary hospital and make recommendations to decrease future CS rates.
MATERIALS AND METHODSThis retrospective analysis compares the 5 most common indications for CS in 1999 and 2009. CS rates in the 2 study periods are tabulated and analysed as well.
RESULTSIn the first study period between January and December 1999, there were 2048 deliveries of which 365 were via CS. In the second study period of a decade later from January to December 2009, there were 1572 deliveries of which 531 were via CS. This gives an increase in CS rate from 17.8% in 1999 to 34% in 2009. The main indications for CS in 1999 were: cephalopelvic disproportion (18.6%), breech (14.2%), non-reassuring fetal status (11.8%), 1 previous CS (11.2%) and pregnancy-induced hypertension/pre-eclampsia/eclampsia (6.6%). The main indications for CS in 2009 were: 1 previous CS (18.1%), non-reassuring fetal status (12.2%), cephalopelvic disproportion (10.5%), 2 or more previous CS (7.9%) and breech (7.7%).
CONCLUSIONThere is a significant increase in CS rates over the last decade with an increased percentage of CS done because of a previous CS. This is associated with increased risk of complications as well. Recommendations are suggested with the view to decrease future CS rates.
Cesarean Section ; trends ; utilization ; Female ; Humans ; Pregnancy ; Retrospective Studies ; Time Factors
7.Melanoma in Singapore: A 20-year review of disease and treatment outcomes.
Pei Ming YEO ; Ziying Vanessa LIM ; Wei Ding Virlynn TAN ; Xiahong ZHAO ; Hui Yi CHIA ; Suat Hoon TAN ; Melissa Ching Ching TEO ; Melissa Wee Ping TAN
Annals of the Academy of Medicine, Singapore 2021;50(6):456-466
INTRODUCTION:
Melanomas in Asians have different clinicopathological characteristics and prognosis from melanomas in Caucasians. This study reviewed the epidemiology and treatment outcomes of cutaneous melanoma diagnosed at a tertiary referral dermatology centre in Singapore, which has a multiracial population. The study also determined whether Asians had comparable relapse-free and overall survival periods to Caucasians in Singapore.
METHOD:
This is a retrospective review of cutaneous melanoma cases in our centre between 1996 and 2015.
RESULTS:
Sixty-two cases of melanoma were diagnosed in 61 patients: 72.6% occurred in Chinese, 19.4% in Caucasians and 3.2% in Indians, with an over-representation of Caucasians. Superficial spreading melanoma, acral lentiginous melanoma and nodular melanoma comprised 37.1%, 35.5% and 22.6% of the cases, respectively. The median time interval to diagnosis was longer in Asians than Caucasians; median Breslow's thickness in Asians were significantly thicker than in Caucasians (2.6mm versus 0.9mm,
CONCLUSION
More physician and patient education on skin cancer awareness is needed in our Asian-predominant population for better outcomes.
Humans
;
Melanoma/therapy*
;
Prognosis
;
Retrospective Studies
;
Singapore/epidemiology*
;
Skin Neoplasms/therapy*
;
Treatment Outcome
8.High Resolution Computed Tomography (HRCT) Imaging Findings of Oval Window Atresia with Surgical Correlation.
Hau Wei KHOO ; Chih Ching CHOONG ; Seng Beng YEO ; Julian Pn GOH ; Tiong Yong TAN
Annals of the Academy of Medicine, Singapore 2020;49(6):346-353
INTRODUCTION:
Isolated oval window atresia (OWA) is a rare cause of congenital conductive middle ear deafness and may be overlooked owing to the normal appearance of the external ear. This anomaly has been previously described, although the published numbers with both imaging and surgical findings are few. Our aim is to correlate the imaging features of OWA with intraoperative findings.
MATERIALS AND METHODS:
This is a single-centre retrospective evaluation of patients who were diagnosed with OWA and who received surgery from January 1999 to July 2006. No new case was diagnosed after 2006 to the time of preparation of this manuscript. High resolution computed tomography (HRCT) imaging of the temporal bones of the patients were retrospectively evaluated by 2 head and neck radiologists. Images were evaluated for the absence of the oval window, ossicular chain abnormalities, position of the facial nerve canal, and other malformations. Imaging findings were then correlated with surgical findings.
RESULTS:
A total of 9 ears in 7 patients (two of whom with bilateral lesions) had surgery for OWA. All patients had concomitant findings of absent stapes footplate with normal, deformed or absent stapes superstructure and an inferiorly displaced facial nerve canal. HRCT was sensitive in identifying OWA and associated ossicular chain and facial nerve abnormalities, which were documented surgically.
CONCLUSION
OWA is a rare entity that can be diagnosed with certainty on HRCT, best visualised on coronal plane. Imaging findings of associated middle ear abnormalities, position of the facial nerve canal, which is invariably mal-positioned, and associated deformity of the incus are important for presurgical planning and consent.
9.Impact of bariatric surgery on the management of type 2 diabetes mellitus in Singapore.
Phong Ching LEE ; Kwang Wei THAM ; Hong Chang TAN ; Shanker PASUPATHY
Singapore medical journal 2013;54(7):382-386
INTRODUCTIONObesity is a risk factor for type 2 diabetes mellitus (T2DM). Metabolic-bariatric surgery (MBS) results in significant weight loss with dramatic improvement in T2DM. This study analysed the effects of MBS on patients with T2DM in a tertiary centre in Singapore.
METHODSIndividuals with T2DM who underwent MBS in a single centre from September 2008 to May 2012, with at least 12 months of regular follow-up, were included in our study. The primary outcome measure was good glycaemic control (glycated haemoglobin [HbA1c] < 6.5%, with or without medications) 12 months after surgery. Secondary outcome measures were partial DM remission (fasting blood glucose [FBG] < 7.0 mmol/L and HbA1c < 6.5% without DM medications), complete DM remission (FBG < 5.6 mmol/L and HbA1c < 6.0% without DM medications), weight, body mass index, blood pressure, and fasting serum lipid, serum glucose and serum insulin levels.
RESULTSOf the 19 patients who met the inclusion criteria, 14 underwent gastric bypass and 5 underwent sleeve gastrectomy. At 12 months postoperatively, 17 (89.5%) patients achieved good glycaemic control. DM remission was achieved in 14 (73.7%) patients, with 10 (52.6%) attaining complete remission.
CONCLUSIONIn Singapore, MBS is an effective treatment modality for obese patients with T2DM. Despite the small sample size and lack of matched controls, the present study suggests that MBS is effective in achieving significant weight loss and eliciting a significant and sustainable improvement in the glycaemic control of patients with T2DM, for up to 12 months.
Adult ; Bariatric Surgery ; Blood Glucose ; analysis ; Body Mass Index ; Diabetes Mellitus, Type 2 ; prevention & control ; Female ; Glycated Hemoglobin A ; analysis ; Humans ; Insulin ; blood ; Lipids ; blood ; Male ; Middle Aged ; Obesity, Morbid ; surgery ; Prospective Studies ; Risk Factors ; Singapore ; Treatment Outcome