Call us: 
+65 6264-2836
#21-11/12 Royal Square Medical Centre
Mon - Fri : 9am - 5pm, Sat : 9am - 1pm
Follow us on:
Logo

Dr. Andrea Rajnakova, Ph.D

Dr. Andrea Rajnakova

Dr. Andrea Rajnakova, Ph.D

MD (Hons), M.Med (Int. Med), MRCP (UK), FAMS (Gastroenterology)

GASTROENTEROLOGY, INTERNAL MEDICINE

info@andrea-digestive-clinic.com
+65 6264-2836

Dr Rajnakova established her private practice at Andrea’s Digestive, Colon, Liver and Gallbladder Clinic at Mount Elizabeth Hospital in 2010 and, in 2018, relocated to her current practice at Royal Square Medical Centre. Her principal clinical interests include therapeutic endoscopy, gastric and colorectal cancer, coeliac disease, and inflammatory bowel disease.

She adopts a holistic and personalised approach to patient care, integrating medical treatment with dietary and lifestyle modification. Where appropriate, she provides assessment for food allergies and intolerances and develops tailored dietary recommendations to support her patients’ overall health and long-term well-being.

Medical Training and Academic Career

Dr Rajnakova began her medical career in Singapore at National University Hospital (NUH), where she completed her specialist training in Gastroenterology. At the National University of Singapore (NUS), she obtained her Doctorate of Medical Studies, focusing on gastric cancer.

Her academic and research achievements have been recognised with several prestigious awards, including the Young Doctor’s Research Award, the Best Paper Award for Gastric Cancer in Singapore, and the Best Oral Presentation in the Medical Disciplines at the 8th Annual Scientific Congress.

Throughout her academic career, Dr Rajnakova has maintained an active involvement in clinical research. She has presented her research at numerous international and local conferences and has published her findings in multiple international peer-reviewed medical journals.

She was also actively involved in medical education and postgraduate training. At NUS, she served as a Clinical Tutor for undergraduate medical students at the Yong Loo Lin School of Medicine, Chief Coordinator for postgraduate examinations, and a mentor and endoscopy trainer for advanced endoscopy specialists and trainees. She has also organised numerous endoscopy workshops for both local and international endoscopists.

Advanced Endoscopy training

Dr Rajnakova was awarded a Health Manpower Development Plan (HMDP) Fellowship for advanced training in Therapeutic Endoscopy and Endoscopic Retrograde Cholangiopancreatography (ERCP) at the European Endoscopic Training Centre, Università Cattolica del Sacro Cuore, Rome, Italy, under the mentorship of Professor Guido Costamagna, former President of the European Society of Gastrointestinal Endoscopy.

Her specialist interests and expertise in therapeutic endoscopy have remained an important part of her clinical practice.

Gastric cancer research

Dr Rajnakova was one of the founding members and investigators of the Gastric Cancer Consortium in Singapore, contributing to research and collaborative efforts that supported the development and implementation of gastric cancer screening guidelines in Singapore.

Her work in this field reflects her longstanding commitment to early detection, prevention and evidence-based management of gastrointestinal cancers.

Clinical Excellence and Professional Recognition

In recognition of her clinical service and contribution to patient care, Dr Rajnakova has received several awards, including the Sunny-Side-Up Award, NUH Service Award, Excellent Service GOLD Award, and the National Excellent Service (EXSA) Star Award.

Her contribution to the wider community and international relations has also been recognised. She received the Goodwill Envoy Award from the Ministry of Foreign Affairs of Slovakia, as well as the Finder Expat-preneur Award in 2020 and the Expat Living Readers’ Award, which she received consecutively from 2019 to 2023.

Languages

Dr Rajnakova is multilingual and speaks fluent English, Czech, Slovak and Russian, enabling her to communicate comfortably with patients from diverse cultural and linguistic backgrounds.

With extensive experience spanning specialist clinical practice, advanced therapeutic endoscopy, research, medical education and postgraduate training, Dr Rajnakova is committed to providing evidence-based, personalised and holistic care to patients with gastrointestinal, liver, pancreatic and colorectal disorders.

Academic Qualifications

1992M.D. (Hons.), Comenius University, Slovakia
1995M. Med. (Hons.) Postgraduate Medical Institute, Bratislava, Slovakia
2000PhD, National University of Singapore, Singapore
2001M. Med, Postgraduate Medical Institute, Singapore
2001MRCP (UK), Royal College of Physicians, United Kingdom
2005FAMS (Gastroenterology), Singapore

Current Attachment

April 2010Senior Consultant Gastroenterologist and Hepatologist, Andrea’s Digestive,
Colon, Liver and gallbladder Clinic Pte Ltd, Mount Elizabeth Hospital,
Singapore
Sept 2018Senior Consultant Gastroenterologist and Hepatologist, Andrea’s Digestive,
Colon, Liver and gallbladder Clinic Pte Ltd, Royal Square Medical Centre,
Singapore

PREVIOUS ATTACHMENTS AND ACHIEVEMENTS

1992 - 1995Medical Officer, Department of Internal Medicine, Derer Hospital,
Bratislava, Slovak Republic
1995Registrar, Department of Internal Medicine, Derer Hospital, Bratislava,
Slovak Republic
1996 - 1999Honorary Fellow, Department of Surgery, National University Hospital,
Singapore
1996 -1999Ph.D. scholar, Department of Surgery, National University of Singapore
1999 - 2001Clinical Fellow, Department of Medicine, National University Hospital,
Singapore
2001 - 2005Registrar, Department of Medicine, Division of Gastroenterology, National
University Hospital, Singapore
2005 – 2007Associate Consultant, Department of Gastroenterology and Hepatology,
National University Hospital, Singapore
2008HMDP: Advanced Endoscopic Management of Benign and Malignant
Pancreatobiliary Disorders, European Endoscopic Training Center, Università
Cattolica Del Sacro Cuore, Gemelli Hospital, Roma, Italy
2008 - 2010Consultant Gastroenterologist, Department of Gastroenterology and
Hepatology, National University Hospital, Singapore
2010 – 2012Co-founding member and investigator for Gastric Cancer consortium in
Singapore and implementation of gastric and colon cancer screening guidelines
in Singapore

Education

1982 – 1986Secondary Grammar School, specialization – English Language
1986 – 1992Faculty of Medicine, Comenius University, Bratislava, Slovak Republic degree: Doctor (MD) with Honors
1997USMLE  Step 1, Step 2, English Test
1995Institute of Postgraduate Medical Studies in Bratislava, Slovak Republic Specialization in Internal Medicine with Honors
2000Doctor of Philosophy, Department of Surgery, National University of Singapore; Thesis: Association of Nitric Oxide with P53 and COX in Gastric Cancer
2001Master of Medicine (Internal Medicine), Postgraduate Medical Institute, Singapore
2001Member of Royal College of Physician (UK), Royal College of Physicians, United Kingdom
2005FAMS (Gastroenterology), Singapore
2008Health Manpower Development Plan HMDP: Advanced Endoscopic Management of Benign and Malignant Pancreatobiliary Disorders, European Endoscopic Training Center, Università Cattolica Del Sacro Cuore, Gemelli Hospital, Roma, Italy

Awards

1997Winner of Young Doctor’s Research Award, NUH Inaugural Annual Scientific Meeting, Singapore. Expression of nitric oxide synthase in human normal gastric mucosa and gastric cancer tissue.
1998The Best Paper Award, oral presentation. Nitric Oxide Symposium, Singapore. Association between nitric oxide synthase, cyclooxygenase, and p53 expression in human gastric cancer and different tumor characteristics.
2007Sunny-Side-Up Award NUH Service Award
2007Sunny-Side-Up Wow Award NUH Service Award
2007Excellent Service GOLD Award 2007
2008National Excellent Service EXSA Star Award 2008
2009Winner of Best Oral Presentation (Medical Disciplines) at NHG 8th Annual Scientific Congress, Singapore 2009
2014Goodwill Envoy Award from Ministry of Foreign Affairs Slovakia
2019The Finder Expat-preneur Awards 2019 Nominee
2019Readers’ Choice Award Expat Living – Bronze 
2020Readers’ Choice Award Expat Living – Gold
2020The Finder Expat-preneur Awards 2020 Winner
20212021 Readers’ Choice Award Expat Living – Gold
2022Readers’ Choice Award Expat Living – Gold
2023Readers’ Choice Award Expat Living – Finalist

Professional Memberships

1997 to dateMember of Gastroenterological Society of Singapore
2002 to dateMember of American Society of Gastrointestinal Endoscopy
2002 to dateSingapore Gastric Cancer Consortium
2009 to dateSingapore Medical Academy

Teaching

2002-07Clinical tutor for undergraduate medical students, Yong Loo Lin School of Medicine, National University Hospital
2002-06Clinical tutor for undergraduate dental students, Yong Loo Lin School of Medicine, National University Hospital
2004Clinical tutor for Master Nursing Students, Singapore
2005 -10Endoscopy training of Advanced Specialist Trainee in Gastroenterology and Endoscopy
2007 -10Mentor for Medical Officers and Medicine BST Trainees, appointed by Yong Loo Lin School of Medicine, National University Hospital
2009Chief Coordinator at NUH for PACES MRCP
2009Organizer and co-Director of Interactive Workshop on Diagnostic and therapeutic Endoscopy: “From Basic To Advanced” organized in conjunction with Boston International Endoscopy Course

Research

1995 – 1999Ph.D. thesis on gastric cancer: Association of nitric oxide with p53 and cyclooxygenase in gastric cancer
1999 – 2001Gerbal model of Helicobacter pylori infection
2004 – 2010Endoscopic surveillance interval for patients with Helicobacter pylori – associated gastritis and intestinal metaplasia (co-PI)
2002 – 2004Association between mutation in NOD2 gene expression and inflammatory bowel disease in Asian patients (Principal Investigator)  
2004 – 2010Gastric Cancer Epidemiology, Clinical and Genetics Programme (GCEP) Cohort Study of Patients at High Risk of Gastric Cancer, co-PI
2005 – 2010A Randomised Trial of Confocal Endomicroscopy versus Non-Targeted Biospy for the Detection of Intestinal Metaplasia in Patients at High Risk of Gastric Cancer (Random-CEGCEP), co-PI
2007A Randomized Study Comparing Endoscopic Video-Autofluorescence Imaging followed by Narrow Band Imaging with Standard Videoendoscopy for the Detection of High Risk Lesions of Stomach, co-PI
2008- 2010A Phase 3, Randomized, Placebo-Controlled, Blinded, Multicenter Study of the Induction and Maintenance of Clinical Response and Remission by MLN0002 in Patients with Moderate to Severe Ulcerative Colitis; Millennium Pharmaceuticals, Inc., Principal investigator

Reviewer of Manuscripts

2008Annals, Academy of Medicine, Singapore
2008Journal of Pancreas
2010Journal of Infection

Publications

  1. Lee JWJ, Zhu F, Srivastava S, Tsao SK, Khor C, Ho KY, Fock KM, Lim WC, Ang TL, Chow WC, So JBY, Koh CJ, Chua SJ, Wong ASY, Rao J, Lim LG, Ling KL, Chia CK, Ooi CJ, Rajnakova A, Yap WM, Salto-Tellez M, Ho B, Soong R, Chia KS, Teo YY, The M, Yeoh KG. Severity of gastric intestinal metaplasia predicts the risk of gastric cancer: a prospective multicentre cohort study (GCEP). Gut. 2021 May 11: gutjnl-2021-324057. doi: 10.1136/gutjnl-2021-324057. Epub ahead of print. PMID: 33975867.
  2. Huang KK, Ramnarayanan K, Zhu F, Srivastava S, Xu C, Tan ALK, Lee M, Tay S, Das K, Xing M, Fatehullah A, Alkaff SMF, Lim TKH, Lee J, Ho KY, Rozen SG, The BT, Barker N, Chia CK, Khor C, Ooi CJ, Fock KM, So J, Lim WC, Ling KL, Ang TL, Wong A, Rao J, Rajnakova A, Lim LG, Yap WM, Teh M, Yeoh KG, Tan P. Genomic and Epigenomic Profiling of High-Risk Intestinal Metaplasia Reveals Molecular Determinants of Progression to Gastric Cancer. Cancer Cell. 2018 Jan 8;33(1):137-150.e5. doi: 10.1016/j.ccell.2017.11.018. Epub 2017 Dec 28. PMID: 29290541.
  3. Zhu Feng, Li Lin Lim, Calvin J. Koh, David E. Ong, Lee Guan Lim, Khek-Yu Ho, Chia Chungking, Christopher J. Khor, Choon Jin Ooi, Kwong Ming Fock, […], Khoon-Lin Ling, Tiing Leong Ang, Andrew S. Wong, Jaideepraj Rao, Andrea Rajnakova, Ming Teh, Manuel Salto-Tellez, Supriya Srivastava, Yik Ying Teo, Khay Guan Yeoh Mo1993 Identification of Individuals at High Risk of Gastric Cancer for Targeted Endoscopic Screening. Gastroenterology 04/2015; 148(4) :S-762.
  4. So J, Rajnakova A, Chan YH, Tay A, Shah N, Salto-Tellez M, Teh M, Uedo N. Endoscopic tri-modal imaging improves detection of gastric intestinal metaplasia among a high-risk patient population in Singapore. Dig Dis Sci. 2013 Dec;58(12):3566-75. doi: 10.1007/s10620-013-2843-2. Epub 2013 Sep 1. Erratum in: Dig Dis Sci. 2014 Jan;59(1):231. Noriya, Uedo [corrected to Uedo, Noriya]. PMID: 23996468.
  5. Lim KC, Tan HK, Rajnakova A, Venkatesh SK. Eosinophilic gastroenteritis presenting with duodenal obstruction and ascites. Ann Acad Med Singap. 2011 Aug;40(8):379-81. PMID: 22065005.
  6. Lim LG, Yeoh KG, Salto-Tellez M, Khor CJ, Teh M, Chan YH, So JB, Rajnakova A, Shen E, Srivastava S, Ho KY. Experienced versus inexperienced confocal endoscopists in the diagnosis of gastric adenocarcinoma and intestinal metaplasia on confocal images. Gastrointest Endosc. 2011 Jun;73(6):1141-7. doi: 10.1016/j.gie.2011.01.068. Epub 2011 Apr 14. PMID: 21492850.
  7. Lim LG, Ho KY, Chan YH, Teoh PL, Khor CJ, Lim LL, Rajnakova A, Ong TZ, Yeoh KG. Urgent endoscopy is associated with lower mortality in high-risk but not low risk nonvariceal upper gastrointestinal bleeding. Endoscopy. 2011 Apr;43(4):300-6. doi: 10.1055/s-0030-1256110. Epub 2011 Feb 28. PMID: 21360421.
  8. Lee-Guan Lim · Khek Yu Ho · Huak Y. Chan · Pui Li Teoh · Christopher J. Khor Andrea Rajnakova · Li Lin Lim · Khay Guan Yeoh · 1096 Glasgow Blatchford Score as an Effective Triage Tool for Identifying Patients With Severe Upper Gastrointestinal Bleeding With High Mortality Risk, Gastroenterology 138(5) · May 2010
  9. A. Rajnakova, L. G. Lim, E. Tan, Y. Y. Dan, Y. M. Lee, V. Lai, S. G. Lim 188 FACTORS PREDICTING IN-HOSPITAL MORTALITY IN CIRRHOTIC PATIENTS PRESENTING WITH SEPSIS Journal of Hepatology 04/2010; 52. DOI:10.1016/S0168-8278(10)60190-0
  10. Rajnakova A, Mutignani M, Costamagna G. Wirsung duct duplication. Pancreas. Mar;39(2):266-8. doi: 10.1097/MPA.0b013e3181bb9059. PMID: 20182316.
  11. Lim LG, Rajnakova A, Yan B, Salto-Tellez M, Lim LL. Recurrent lower gastrointestinal bleeding secondary to cytomegalovirus-associated colonic ulcer in a non-human immunodeficiency virus infected patient: timely diagnosis and treatment averted surgery. Colorectal Dis. 2009 Nov;11(9):984-5. doi: 10.1111/j.1463-1318.2008.01696. x. Epub 2008 Oct 1. PMID: 19175636.
  12. Zhu F, Loh M, Hill J, Lee S, Koh KX, Lai KW, Salto-Tellez M, Iacopetta B, Yeoh KG, Soong R; Singapore Gastric Cancer Consortium. Genetic factors associated with intestinal metaplasia in a high-risk Singapore-Chinese population: a cohort study. BMC Gastroenterol. 2009 Oct 13; 9:76. doi: 10.1186/1471-230X-9-76. PMID: 19822020; PMCID: PMC2766386.
  13. Ito K, Liu Q, Salto-Tellez M, Yano T, Tada K, Ida H, Huang C, Shah N, Inoue M, Rajnakova A, Hiong KC, Peh BK, Han HC, Ito T, Teh M, Yeoh KG, Ito Y. RUNX3, a novel tumor suppressor, is frequently inactivated in gastric cancer by protein mislocalization. Cancer Res. 2005 Sep 1;65(17):7743-50. doi: 10.1158/0008-5472.CAN-05-0743. Erratum in: Cancer Res. 2006 Mar 15;66(6):3345. PMID: 16140942.
  14. Rajnakova A, Goh PM, Ngoi SS, Lim SG. ERCP in patients with periampullary diverticulum. Hepatogastroenterology. 2003 May-Jun;50(51):625-8. PMID: 12828047.
  15. Gwee KA, Collins SM, Read NW, Rajnakova A, Deng Y, Graham JC, McKendrick MW,Moochhala SM. Increased rectal mucosal expression of interleukin 1beta in recently acquired post-infectious irritable bowel syndrome. Gut. 2003 Apr;52(4):523-6. doi: 10.1136/gut.52.4.523. PMID: 12631663; PMCID: PMC1773606.
  16. Lim SG, Wai CT, Rajnakova A, Kajiji T, Guan R. Fatal hepatitis B reactivation following discontinuation of nucleoside analogues for chronic hepatitis B. Gut. 2002 Oct;51(4):597-9. doi: 10.1136/gut.51.4.597. PMID: 12235087; PMCID: PMC1773395.
  17. Rajnakova A, Moochhala S, Goh PM, Ngoi S. Expression of nitric oxid synthase, cyclooxygenase, and p53 in different stages of human gastric cancer. Cancer Lett. 2001 Oct 30;172(2):177-85. doi: 10.1016/s0304-3835(01)00645-0. PMID: 11566494. 
  18. Rajnakova A., Goh P. M. Y., Kum C. K., Ngoi S. S.Preliminary clinical
    experience with Histoacryl glue in upper gastrointestinal bleeding. Invited
    paper CHIRURGICKÁ ENDOSKOPIA (Surgical Endoscopy) Slovenský chirurg I /2001, 9-12. (slovak journal) 
  19. Skultety J, Matis P, Ziak M, Labas P, Durdik S, Cheah WK, Rajnakova A, Goh P. Transoral application of EEA stapler after subtotal oesophagectomy. Eur J Surg. 2000 Jan;166(1):50-3. doi: 10.1080/110241500750009708. PMID: 10688217.
  20. Moochhala S, Rajnakova A. Role of nitric oxide in cancer biology. Free Radic Res. 1999 Dec;31(6):671-9. doi: 10.1080/10715769900301231a. PMID: 10630689.
  21. Rajnakova A. Various Endoscopic Findings and Procedures. Atlas of Minimally   Invasive Surgery and Surgical Endoscopy, Neografia a.s. Martin, 1st edition, 147-150, 1999, book chapter. 
  22. Tan W, Rajnakova A, Kum CK, Alponat A, Goh PM. Evaluation of percutaneous endoscopic gastrostomy in a university hospital. Hepatogastroenterology. 1998 Nov-Dec;45(24):2060-3. PMID: 9951866.
  23. Rajnakova A, Tan WT, Goh PM. Double papilla of Vater: a rare anatomic anomaly observed in endoscopic retrograde cholangiopancreatography. Surg Laparosc Endosc. 1998 Oct;8(5):345-8. PMID: 9799141.
  24. Rajnakova A, Goh PM, Chan ST, Ngoi SS, Alponat A, Moochhala S. Expression of differential nitric oxide synthase isoforms in human normal gastric mucosa and gastric cancer tissue. Carcinogenesis. 1997 Sep;18(9):1841-5. doi: 10.1093/carcin/18.9.1841. PMID: 9328184.
  25. Alponat A, Kum CK, Rajnakova A, Koh BC, Goh PM. Predictive factors for synchronous common bile duct stones in patients with cholelithiasis. Surg Endosc. 1997 Sep;11(9):928-32. doi: 10.1007/s004649900489. PMID: 9294275.
  26. Alponat A, Kum CK, Koh BC, Rajnakova A, Goh PM. Predictive factors for conversion of laparoscopic cholecystectomy. World J Surg. 1997 Jul- Aug;21(6):629-33. doi: 10.1007/pl00012288. PMID: 9230661.
  27. Alponat A, Lakshminarasappa SR, Teh M, Rajnakova A, Moochhala S, Goh PM, Chan ST. Effects of physical barriers in prevention of adhesions: an incisional hernia model in rats. J Surg Res. 1997 Mar;68(2): 126-32.doi: 10.1006/jsre.1996.4979. PMID: 9184670.

Pubblished Abstracts

  1. Rajnakova A, Goh P, Kum CK, Alponat A. Evaluation of percutaneous endoscopic gastrostomy in a University Hospital. Surgical Endoscopy, 11(5), May 1997, 608.
  2. Rajnakova A, Goh P. Preliminary clinical experience with Histoacryl glue in upper gastrointestinal bleeding. Surgical Endoscopy, 11(5), May 1997, 501.
  3. Alponat A, Kum CK, Rajnakova A, Goh P Predictive factors for synchronous common bile duct stones in-patients with cholelithiasis. Surgical Endoscopy, 11(5), May 1997, 526.
  4. Rajnakova A, Goh P, Moochhala S. Nitric oxide synthase and p53 expression in human gastric cancer. Gastrointestinal Endoscopy, 47(4), April 1998, 266.
  5. Rajnakova A, Goh P. ERCP in patients with periampullary diverticulum. Surgical Endoscopy, 12(5), May 1998.
  6. Rajnakova A, Goh P, Ngoi SS, Moochhala S. Correlation of nitric oxide synthase, cyclooxygenase and p53 expression with the tumor stage of human gastric adenocarcinoma. Gastroenterology 1999; 116.
  7. Rajnakova A, Moochhala S, Goh P, Ngoi SS. The association of nitric oxide synthase, cyclooxygenase and p53 with different stages of human gastric cancer. J Gastroenterol Hepatol 2002, 17(suppl).
  8. Ho L, Lee H, Wong W, Rajnakova A. Curry reduces symptom threshold to gastric distension following water ingestion. J Gastroenterol Hepatol 2002, 17(Suppl), A639.
  9. Rajnakova A, Ho KY, Tun M, Yeoh KG. What is the appropriate endoscopic surveillance interval for patents with Helicobacter pylori-associated gastritis and intestinal metaplasia in a country with moderate risk of gastric cancer? Gastroenterology 2004, April (Suppl):A-620
  10. KG Yeoh, F Zhu, KY Ho, JL Khor, A Rajnakova, WC Lim, WC Chow, CJ Ooi, CS Foo, HY Wong, KM Fock, Y Ito. Predictive Risk Factors associated with IntestinalMetaplasia in a Prospective Chinese Cohort under Surveillance for Gastric Cancer. Gastroenterology 2007
  11. So, Jimmy B; Rajnakova, Andrea; Salto-Tellez, Manuel; Shah, Nilesh; Chan, Huak Y.; Teh, Ming; Yeoh, Khay-Guan; Uedo, Noriya. A Randomized Crossover Study Comparing Video Endoscopic Autofluorescence Imaging Followed by Narrow Band Imaging with Standard Endoscopy for the Detection of High Risk Lesions in Stomach. Gastroenterology 2008.
  12. KG Yeoh, N. Shah, M. salto-Tellez, M. the, JBY So, KY Ho, CJL Khor, HC Low, A Rajnakova, CK Chia, WC Lim, TL Ang, KM Fock, KL Ling, CJ Ooi, F Zhu, B Ho. The prevalence of cardia inflammation and pre-cancerous lesions in a high risk Chinese cohort being screened for gastric cancer. Gut 008;57 (Suppl II)A123.
  13. M. Mutignani, G Mattiucci, A Rajnakova, A Tringali, P Familiari, G mantini, M Balducci, N Dinapoli, G Costamagna. New endoscopic approach to high dose-rate intraluminal brachytherapy in the management of malignant biliary obstruction. Endoscopy 2008;40 (Suppl I), A208
  14. G Lee, A Rajnakova, L Ho. Suspected small bowel bleeding evaluated by capsule endoscopy in an Asian centre – a risk factor analysis. Endoscopy 2008;40 (Suppl A308)
  15. Rajnakova A; Salto-Tellez, M; Teh, M; Chan, HY.; So, JB.Detection of Pre-Neoplastic Gastric Lesions in a High Risk Chinese Cohort Using Endoscopic Autofluorescence Imaging followed by Narrow Band Imaging versus Standard White Light Endoscopy ? Prospective Randomized Double Blind Crossover Study. Gastroenterology (May) 2009
  16. KG Yeoh, F Zhu ,KY Ho, JL Khor, M Salto-Tellez, M Teh, WC Lim, CK Chia, J.B.Y.So, H.C. Low, KL Ling, TL Ang, LG Lim, A Rajnakova, CJ Ooi, KM Fock, B.Ho and the Singapore Gastric Cancer Consortium. Risk Factors Associated with Intestinal Metaplasia, a Gastric Pre-Malignant Lesion, in a Chinese Cohort under Surveillance for Gastric Cancer. Gastroenterology (May) 2009.

Conference Presentations

  1. Rajnakova A, Goh P, Moochhala S. Role of nitric oxide in gastric pathology in humans and the influence of Helicobacter pylori. 2nd International Conference of Czech and Moravian Club of Invasive   Endoscopy, Brno, Czech rep., May 1996, oral presentation.
  2. Rajnakova A, Goh P, Alponat A, Kum CK. Percutaneous Endoscopic Gastrostomy – Our Experiences in NUH Singapore. 2nd International Conference of Czech and Moravian Club of Invasive Endoscopy, Brno, Czech rep., May 1996, oral presentation.
  3. Rajnakova A, Goh PMY, Alponat A, Guan YK, Moochhala S. Aberrant expression of nitric oxide synthase in gastric cancer. University Surgeons of Asia (2nd Scientific Congress), Singapore, August 1996, oral presentation.
  4. Rajnakova A, Goh P, Kum CK, Alponat A. Evaluation of percutaneous endoscopic gastrostomy in a University Hospital. Euro – Asian Congress of Endoscopic Surgery, Istanbul, Turkey, 17 – 21 June 1997, poster.
  5. Rajnakova A, Goh P. Preliminary clinical experience with Histoacryl glue in upper gastrointestinal bleeding. Euro-Asian Congress of Endoscopic Surgery, Istanbul, Turkey, 17 – 21 June 1997, oral presentation.
  6. Rajnakova A, Goh PMY, Chan STF, Moochhala S. Expression of nitric oxide synthase in human normal gastric mucosa and gastric cancer tissue. NUH Inaugural Annual Scientific Meeting, 28 – 29 June 1997, Singapore, oral presentation, winner of Young Doctor’s Research Award.
  7. Rajnakova A, Goh P, Moochhala S. Nitric oxide synthase and p53 expression in human gastric cancer. Digestive Disease Week, New Orleans, LA, 17-20 May 1998, poster.
  8. Rajnakova A, Goh P. ERCP in patients with periampullary diverticulum. 6th World Congress of Endoscopic Surgery, Rome, Italy, 31 May – 6 June 1998, oral presentation.
  9. Rajnakova A., Goh P. Nitric oxide pathways in aethiology of gastric cancer. International Workshop on Stomach Cancer, Singapore, 3-4 August 1998, oral presentation.
  10. Rajnakova A, Goh P, Ngoi SS, Chan S, Moochhala S Association between nitric oxide synthase, cyclooxygenase, and p53 expression in human gastric cancer and different tumor characteristics. Nitric Oxide Symposium, April 1999, Singapore, oral presentation, The best paper award, oral presentation.
  11. Moochhala S, Rajnakova A. Role of nitric oxide in tumor biology. Nitric Oxide Symposium, April 1999, Singapore, abstract book, pp. 112-125, oral presentation
  12. Rajnakova A, Goh P, Ngoi SS, Moochhala S. Correlation of nitric oxide synthase, cyclooxygenase and p53 expression with the tumor stage of human gastric  adenocarcinoma. DDW 1999, G2149, poster.
  13. Rajnakova A, Goh PMY, Ngoi SS, Moochhala S. Nirtic oxide synthase and cyclooxygenase expressions in different stages of human gastric adenocarcinoma . DDW 2001, poster.
  14. Rajnakova A, Moochhala S, Goh P, Ngoi SS. The association of nitric oxide synthase, cyclooxygenase and p53 with different stages of human gastric cancer. WCOG 2002, Bangkok, poster.
  15. Ho L, Lee H, Wong W, Rajnakova A. Curry reduces symptom threshold to gastric distension following water ingestion. WCOG 2002, Bangkok, poster with distinction.
  16. Rajnakova A, Ho KY, Tun M, Yeoh KG. What is the appropriate endoscopic surveillance interval for patients with Helicobacter pylori-associated gastritis and intestinal metaplasia in a country with moderate risk of gastric cancer? DDW 2004, poster.
  17. Rajnakova A, Ho KY. Association between NOD2 gene mutation and inflammatory bowel disease in Asian patients. Combined Scientific Meeting, Singapore 2005, poster.
  18. Rajnakova A, Ho KY. Association between NOD2 3020insC frameshift mutation and inflammatory bowel disease in Asian patients. GESS meeting Singapore, 2006, oral presentation
  19. KG Yeoh, F Zhu, KY Ho, JL Khor, A Rajnakova, WC Lim, WC Chow, CJ Ooi, CS Foo, HY Wong, KM Fock, Y Ito. Predictive Risk Factors associated with Intestinal Metaplasia in a Prospective Chinese Cohort under Surveillance for Gastric Cancer. Gastroenterology (May) 2007, DDW 2007, WashingtonDC, USA.
  20. KG Yeoh, N Shah, M Salto-Tellez, M Teh, J.B.Y.So, KY Ho, JL Khor, H.C. Low6, A Rajnakova, CK Chia, WC Lim, TL Ang, KM Fock, KL Ling, CJ Ooi, F Zhu, B.Ho, Y Ito The Prevalence of Cardia Inflammation and Pre-Cancerous Lesions in a High Risk Chinese Cohort Being Screened for Gastric Cancer, Gastroenterology (May) 2008, DDW 2008 San Diego, USA, oral presentation.
  21. Rajnakova A Tringali A, Mutignani M,Costamagna G. New endoacopic approach to high dose-rate intraluminal brachytherapy in the management of malignant biliary obstruction. UEGW Vienna 2008
  22. Rajnakova A, Lee GH, Ho KY. Suspected small bowel bleeding evaluated by capsule endoscopy in an Asian Centre – A risk factor analysis, UWGW Vienna, 2008.
  23. So, Jimmy B.; Rajnakova, Andrea; Salto-Tellez, Manuel; Shah, Nilesh; Chan, Huak Y.; Teh, Ming; Yeoh, Khay-Guan; Uedo, Noriya. A Randomized Crossover Study Comparing Video Endoscopic Autofluorescence Imaging Followed by Narrow Band Imaging with Standard Endoscopy for the Detection of High Risk Lesions in Stomach. DDW 2008 San Diego, USA
  24. Rajnakova A; Salto-Tellez, M; Teh, M; Chan, HY.; So, JB. Detection of Pre-Neoplastic Gastric Lesions in a High Risk Chinese Cohort Using Endoscopic Autofluorescence Imaging followed by Narrow Band Imaging versus Standard White Light Endoscopy ? Prospective Randomized Double Blind Crossover Study. Gastroenterology (May) 2009. DDW Chicago 2009, oral presentation.
  25. KG Yeoh, F Zhu ,KY Ho, JL Khor, M Salto-Tellez, M Teh, WC Lim, CK Chia, J.B.Y.So, H.C. Low, KL Ling, TL Ang, LG Lim, A Rajnakova, CJ Ooi, KM Fock, B.Ho and the Singapore Gastric Cancer Consortium. Risk Factors Associated with Intestinal Metaplasia, a Gastric Pre-Malignant Lesion, in a Chinese Cohort under Surveillance for Gastric Cancer. Gastroenterology (May) 2009. DDW Chicago 2009, poster presentation
  26. Lee Guan Lim, Feng Zhu,  Khek Yu Ho, Chung King Chia, Christopher Khor, Choon-Jin Ooi, Kwong Ming Fock, Jimmy So, Wee Chian Lim, Khoon Lin Ling, Ang Tiing Leong, Andrew Wong, Andrea Rajnakova, Ming Teh, Supriya Srivastava, Khay Guan Yeoh. Systematic Endoscopic Surveillance in a High-risk Cohort is Feasible for the Detection of Early Gastric Neoplasia. Gastroenterology (May) 2013. DDW Chicago 2013
  27. Feng, Zhu, Li Lin, Lim, Calvin JY, Koh, David EH, Ong, Lee Guan, Lim, Khek Yu, Ho, Chung King, Chia, Christopher JL, Khor, Choon-Jin, Ooi, Kwong Ming, Fock, Jimmy BY, So, Wee Chian, Lim, Khoon Lin, Ling, Ang Tiing, Leong, Andrew S, Wong, Jaideepraj, Rao, Andrea, Rajnakova, Ming, Teh, Manuel, Salto-Tellez, Supriya, Srivastava, Yick Ying, Teo, Khay Guan, Yeoh. Identification of individuals at high risk of gastric cancer for targeted endoscopic screening. Gastroenterology (May) 2015. DDW Washington 2015, accepted

Workshops Organization

  1. Basic and Advanced Endoscopic Gastrointestinal Workshop, National University Hospital, Singapore, February 28 – 29, 1996, organizing committee.
  2. The Role of Minimally Invasive Surgery in Cancer, ELSA, Minimally Invasive Surgical Center, National University Hospital, Singapore, August 5 – 6, 1996,  organizing committee.
  3. International Workshop on Advanced Laparoscopic Surgery, Minimally Invasive Surgical Center, National University Hospital, Singapore, November 4 – 5, 1996, organizing committee.
  4. First Asian Workshop on Needlescopic Surgery, Singapore, May 5 – 6th 1997, organizing committee.
  5. First National Endoscopy Workshop, NUH, Singapore, 3 – 4 July 1997, organizing committee.
  6. Second Asian Workshop on Needlescopic Surgery, Singapore, May 3-5th 1998, organizing committee.
  7. International Workshop on Stomach Cancer, Singapore, 3-4 August 1998, organizing committee.
  8. International Symposium and Live Video Demonstration on Advanced Laparoscopic Surgery, Singapore, 31 January – 2 February, 1999, organizing committee.
  9. 7th World Congress of Endoscopic Surgery, 1-4th June 2000, Singapore, General      Secretary.
  10. Endoscopic Workshop, National University Hospital, Singapore, 27th October 2001, organizing committee.
  11. 1st Asian EUS Forum, National University Hospital, Singapore, 6th December 2003, organizing committee.
  12. 2nd Asian EUS Forum, National University Hospital, Singapore, 10th-11th December 2004, organizing committee.
  13. Asian Basic Hands-on EUS Course, National University Hospital, Singapore, 17th-18th December 2005, organizing committee.
  14. Asian Hands-on EUS Course, National University Hospital, Singapore, 10th-11th    December 2006, organizing committee.
  15. Organizer and Course co-Director of Interactive Workshop on Diagnostic and therapeutic   Endoscopy : From Basic To Advanced, organized in conjunction with Boston International Endoscopy Course

Dr. Andrea Rajnakova

MD, Hons (Slovakia), M.Med, Hons (Slovakia), PhD (NUS), MMed (SG), MRCP (UK), FAMS in Gastroenterology (SG)

Your Insides Matter More Than You Know

This article has been medically reviewed by Dr Rajnakova
Dr Rajnakova is a Consultant Gastroenterologist with over 30 years of experience in gastroenterology, therapeutic endoscopy and digestive health. A PhD scholar in gastric cancer with multiple awards and publications, she is committed to providing holistic, patient-centred care, with special interests in celiac disease, food allergies, diet and nutrition.
Dr Andrea Rajnakova
Copyright © 2026 - Andrea’s Digestive, Colon, Liver and Gallbladder
Clinic Pte. Ltd. All rights reserved