Winson Tan Jianhong
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Clin Assoc Prof Winson Tan Jianhong

Clin Assoc Prof Winson Tan

MBBS(Hons)(S'pore), MRCS(Ed), MMed(Surgery), FRCS(Ed)

Head & Senior Consultant

Sengkang General Hospital

Specialty: General Surgery, Colorectal Surgery

Clinical Appointments

  • Senior Consultant Department of General Surgery Sengkang General HospitalSengkang General Hospital
  • Head & Senior Consultant Colorectal Service Sengkang General HospitalSengkang General Hospital


 Dr Winson Tan graduated with MBBS(Hons), as the valedictorian of his cohort, from the Yong Loo Lin School of Medicine, National University of Singapore in 2009. He subsequently entered the Singhealth General Surgery Residency Programme in 2010 and eventually graduated in 2015 as the valedictorian of that year. He obtained his Fellowship of the Royal College of Surgeons (Edinburgh) in 2015 and was awarded the College of Surgeon, Singapore, Gold Medal for being the top candidate in the Surgical Exit Examination.

In 2018, he went to Royal Prince Alfred Hospital, Sydney and completed a Fellowship in Colorectal and Advanced Gastrointestinal Oncological Surgery. He furthered his training in colorectal cancer care by completing the Advanced Colorectal Surgical Oncology fellowship in Memorial Sloan Kettering Cancer Center (New York, USA) from 2018-2019. 

His clinical interests include the various aspects of colorectal surgical oncology, proctology and acute care surgery.


  • MBBS (Hons)(S’pore)
  • MRCS (Edin)
  • M Med (Surg)
  • FRCS (Edin)

Professional Appointments and Committee Memberships

  • Committee Member, Singapore Society of Colorectal Surgeons


  • 24th Yahya Cohen Memorial Lectureship – Awarded for academic excellence for the best scientific paper published over a 24 month period
  • Dean's Appreciation for Clinical Teachers – Special Recognition Award (SRA)
  • Singhealth Residency – Outstanding Faculty Award
  • Singhealth Excellence Award 2017 – Distinguished Young Researcher Award
  • College of Surgeons, Singapore Gold Medal Award – Awarded to the top candidate in the Surgical Exit Examination
  • Singhealth Publish Award 2016 (Awarded to researcher who published quality articles in internationally acclaimed scientific journals)
  • Special Recognition Award from Yong Loo Lin School of Medicine – Inspirational Tutor Award
  • Singhealth Outstanding Resident Award 2015
  • Valedictorian of Singhealth Residency Programme
  • Dean's Award for Teaching Excellence 2015
  • Junior Doctor Teaching Award 2015

Research Interests

​Dr Winson Tan has published more that 20 articles in peer-reviewed journals. He is also the recipient of a National Medical Research Council research grant studying the efficacy and cost effectiveness of a proposed algorithm for management of suspected appendicitis. His research achievements culminated in him being awarded the Singhealth Excellence - Distinguished Young Researcher Award in 2017. He remains actively involved in clinical, educational and translational research projects.



  • World Journal of Gastrointestinal Surgery 2019 May 27;11(5):247-260
    Prediction of overall survival after colorectal surgery in elderly patients

    Seow-en I, Tan WJ, Dorajoo SR, Soh SHL, Law YC, Park SY, Choi GS, Tan WS, TangCL, Chew MH
  • Colorectal Diseases 2019 Mar;21(3):365-369
    Addressing the empty pelvic syndrome following total pelvic exenteration: does mesh reconstruction help?
    Lee P, Tan WJ, Brown KGM, Solomon MJ


  • Journal of Gastrointestinal Cancer 2018 Dec;49(4):422-428
    Rectal Cancer Surveillance – Recurrence Patterns and Survival Outcomes from a Cohort Followed up Beyond 10 years
    Tan WJ, Ta HJ, SR Dorajoo, Foo FJ, Tang CL, Chew MH

  • Journal of Gastrointestinal Cancer 2018 Sep;49(3):311-318
    Evaluation of Long-Term Outcomes in Microsatellite Instability Status in an Asian Cohort of Sporadic Colorectal Cancers
    WJ Tan, JL Hamzah, S Acharyya, FJ Foo, KH Lim, IBH Tan, CL Tang, Chew

  • BMC Gastroenterology, 29 Aug 2018,18(1):133
    Synchronous polypectomy during endoscopic diagnosis of colorectal cancer – is the risk of tumour implantation at the polypectomy site significant
    Tan WJ, Ng NZ, Chen YD, Chee YHM, Foo FJ, Tang CL, Chew MH

  • International Journal of Colorectal Disease 2018, 5 Jan 2018,33(2):171-80
    Systematic review and meta-analysis of the use of serum procalcitonin levels to predict intra-abdominal infections after colorectal surgery
    Tan WJ, Ng WQ, Sultana R, deSouza NN, Chew MH, Foo FJ, Tang CL, Tan WS


  • Diseases of Colon and Rectum. 2017 Sep;60(9): 895-904
    Novel Scoring Model Predicting Survival After Primary Tumor Resection in Stage IV
    Colorectal Cancer with unresectable metastases.
    WJ Tan, Dorajoo SR, MY Chee, FJ Foo, CL Tang, Chew MH


  • World Journal of Gastrointestinal Surgery 2016 Jun 27;8(6):452-60.
    Critical Appraisal of Laparoscopic vs Open Rectal Cancer Surgery.
    WJ Tan, MH Chew, AR Dharmawan, M Singh, S Acharyya, CTT Loi, CL Tang


  • Journal of the American College of Surgeons 2015 Feb;220(2):218-24.
    Prospective Comparison of the Alvarado Score and CT Scan in the Evaluation of Suspected Appendicitis: A Proposed Algorithm to Guide CT Use.
    WJ Tan, S Acharyya, YC Goh, WH Chan, WK Wong, LL Ooi, HS Ong

  • Head and Neck 2015 Apr 27. doi: 10.1002/hed.24113
    Prognostic Significance of Lymph Node Density in Squamous Cell Carcinoma of the Tongue
    Ong W, Zhao R, Lui B, Tan W, Ebrahimi A, Clark JR, Soo KC, Tan NC, Tan HK, Iyer NG.

  • Journal of the American College of Surgeons 2015 Aug; 221(2):635-6
    Evaluating Suspected Appendicitis: In reply to Muralidharan and colleagues.
    WJ Tan, HS Ong

  • Colorectal Dis. 2015 Oct 6. doi: 10.1111/codi.13142
    Palliative surgical intervention in metastatic colorectal carcinoma - a prospective analysis of quality of life
    Tan WJ, Chew MH, Tan Bee Huat I, Law J, Zhao R, Acharyya S, Mao YL, Fernandez LG, Loi CT, Tang CL.

  • Int J Colorectal Dis. 2015 Oct 21. [Epub ahead of print]
    A Scoring Model for predicting survival following primary tumor resection in stage IV colorectal cancer patients with unresectable metastasis.
    Dorajoo SR, Tan WJ, Koo SX, Tan WS, Chew MH, Tang CL, Wee HL, Yap CW


  • Clin Gastroenterol Hepatol 2014 Jun;12(6):xxv-xxvi 
    Benign Pneumatosis Intestinalis                                                                                                  
    Lim CX, Tan WJ, Goh BK

  • Annals of the Academy of Medicine, 2014 Sep;43(9):464-8. Clinical Outcome and Cost Comparison between Laparoscopic and Open Appendicectomy       
    WJ Tan, WS Pek, K Tousif, WH Chan, WK Wong, HS Ong

  • European Journal of Surgical Oncology 2014 Aug; 40(8):909-16
    Quality of life in patients with peritoneal surface malignancies after cytoreductive surgery and hyperthermic intraperitoneal chemotherapy
    CS Chia, WJ Tan, JF Wong, GHC Tan, KC Soo, MCC Teo

  • Techniques of Coloproctology 2014 Nov;18(11):1127-8.
    The Merocel Anal Pack : An innovative use for symptomatic hemorrhoids.
    WJ Tan, S Yusof



  • Annals of Surgical Oncology 2013 Dec;20(13):4219-23                                                                      
    Quality of Life After Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemotherapy: An Asian Perspective
  • WJ Tan, JF Wong, CS Chua, GHC Tan, KC Soo, MCC Teo

  • Journal of Surgical Case Report, 2013 (doi:10.1093/jscr/rjs050)                                         
    A Rare Cause of Gastro-Intestinal Haemorrhage : Gastric Invasion by Hepato-Cellular Carcinoma 
     WJ Tan, CS Chia, HS Ong

  • Australia New Zealand Journal of Surgery 2013 Oct;83(10):748-52
    Alvarado Score: a guide to Computed Tomography Utilization in Suspected Appendicitis
    WJ Tan, WS Pek, K Tousif, YC Goh, WH Chan, WK Wong, HS Ong

  • International Journal of Surgery Case Report 2013;4(3):305-7
    Ovarian Preservation with Subcutaneous Transposition in the setting of Cyto-Reductive Surgery
    WJ Tan, J Jung, CS Chia, MC Teo, HC Toh, KC Soo

  • Acute Surgical Handbook (Clinical Handbook Written for use by Junior Residents)


  • OtoRhinoLaryngology (ORL2012 Nov 2;74(5):266-272
    Prognostic Significance of Invasion Depth in Oral Tongue Squamous Cell Carcinoma.
    WJH Tan, CS Chia, HK Tan, KC Soo, NG Iyer  

  • Singapore Medical Journal 2012 Jun 53(6): e131-132
    Giant Omental Lipoma                                                                                                       
    WJ Tan, WH Chan

  • DUKE NUS Voice Annotated Presentation                                                                                 
    Acute Pancreatitis
    WJH Tan


  • HPB (Oxford). 2011 Aug;13(8):566-72                                                                      
    Moving towards the New International Study Group for Pancreatic Surgery (ISGPS) definitions in pancreaticoduodenectomy: a comparison between the old and new
    WJTan, AW Koh, KH Liau


  • Annals of Academy of Medicine 2010;39:359-62 
    An Audit Study of the Sensitivity and Specificity of Ultrasound, Fine Needle Aspiration Cytology and Frozen Section in the evaluation of thyroid malignancies in a tertiary institution.                                                                                                                  
    Winson JH Tan, Kaushal AS, Liau KH, Low CH

Research Trials

  • ​2015 - Randomized Control Trial Comparing Proposed Algorithm and Current Best Practice in the Evaluation of Suspected Appendicitis, Singapore
  • 2017 - Clinician Scientist Support Programme of above study, Singapore