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Assoc Prof Ong Yee Siang

Assoc Prof Ong Yee Siang

MBBCHir (Cambridge), MRCSC (Edin), Cosmetic Surgery M. Med (Surgery), FAMS (Plastic Surgery)

Head & Senior Consultant

Specialty: Plastic, Reconstructive & Aesthetic Surgery

Clinical Interest: Aesthetic & Reconstructive Microsurgery

Conditions Treated by this Doctor:
Aesthetic Surgery, Breast Reconstruction, Burns, Head and Neck Reconstruction.

Clinical Appointments

  • Head & Senior Consultant Plastic, Reconstructive & Aesthetic Surgery Singapore General HospitalSingapore General Hospital
  • Senior Consultant Plastic, Reconstructive and Aesthetics Service Sengkang General HospitalSengkang General Hospital
  • Senior Consultant SingHealth Duke-NUS Head and Neck Centre

Academic Appointments

  • Programme Director


A/Prof Ong Yee Siang graduated from University of Cambridge, UK in 1996. He completed his housemanship and training in Plastic and Reconstructive Surgery in Singapore before he embarked on 1 year fellowship in Reconstructive Microsurgery in Duke University, USA. His clinical interests are mainly in Reconstructive Microsurgery, in particular, Breast and Head and Neck reconstruction. He is also the Program Director for SingHealth Plastic, Reconstructive and Aesthetic Surgery Residency, being responsible for training of Residents in the specialty.


  • MBBS (UK)
  • Bachelor of Arts, Hons, Neuroscience, Cambridge University (UK)
  • Master of Arts, Cambridge University (UK)
  • MRCSEd
  • MMed Surgery
  • Fellow of Academy of Medicine, Plastic Surgery

Professional Appointments and Committee Memberships

  • Adjunct Associate Professor, Duke-NUS Medical School
  • Adjunct Assistant Professor, NUS Yong Loo Lin School of Medicine
  • Programme Director, SingHealth Surgery-in-General Residency Program
  • Secretary, Singapore Society of Reconstructive Micrcosurgery
  • Member, Royal College of Surgeons, Edinburgh
  • Fellow of Academy of Medicine, Plastic Surgery


  • Residency in SingHealth Excellence (RISE) Award for Best Faculty, 2016
  • Residency in SingHealth Excellence (RISE) Award for Passionate Educator and Innovative Educator, 2012
  • Duke-NUS Faculty Appreciation Award - Most Outstanding Faculty for MSK
  • SGH Surgical Star Inspiring Teacher Award, 2011
  • Service Quality Award, 2010
  • Singapore Health Quality Service Award - Silver, 2009/2010

Research Interests


  • Liver abscess in South-East Asian Patients - a review of 73 patients from Singapore.  KVS Liew, TC Lau, Ch Ho, TK Cheng, Ong YS. Singapore Medical Journal Oct 2000;41(10):489-92.
  • Long-term Biomechanical properties and Histological changes in 2-octylcyanoacrylate assisted microvascular anastomosis in rat femoral arteries.  Ong YS, Yap K, Ang ES, Tan KC, Ng RT, Song IC. Microsurgery 2004; 24(4): 304-8. Presented at American Society of Reconstructive Microsurgery Meeting 2003. Best Poster Award (Medical Officer/Registrar) at Singapore General Hospital Annual Scientific Meeting 2003.
  • Meta-analysis of early excision of burns.  Ong YS, Samuel M, Song C. Burns. 2006 Mar;32(2):145-50. Presented at Royal Australian College of Surgeons Annual Scientific Congress 2005, Perth.
  • Abdominal wall necrotising fascitis: is it still "Meleney's Minefield".  Wong CH, Song C, Ong YS, Tan BK, Foo CL. Plast Reconstr Surg 2006 Jun;117(7):147e-150e.
  • Extended Applications of Vascularized Preauricular and Helical Rim Flaps in Reconstruction of Nasal Defects.  YX Zhang, J Yang, DR Wang, Ong YS, KE. Follmar, YG Zhang, D Erdmann, MR. Zenn, YL Qian, LS Levin. PRS 121(5)May 2008pp 1589-159.
  • Triple Chimeric Flap Based on Anterior Tibial Vessels for Reconstruction of Severe Traumatic Injuries of the Hand with Thumb Loss.  YX Zhang, J Yang, DR Wang, YG Zhang, Ong YS et al. PRS 123(1)January 2009pp 268-275.
  • Hand Infections.  Ong YS, LS Levin. Plast Recon Surg 124: 225e, 2009.
  • Increased signs of acute rejection with ischaemic time in a rat musculocutaneous allotransplant model.  Pradka SP, Ong YS, Zhang YS, Davis SJ, Baccarani A, Messmer C, Fields TA, Klitzman B, Levin LS. Transplant Proc 2009 Mar:41(2):531-6.
  • The fibula osteoseptocutaneous flap incorporating the hemisoleus muscle for complex head and neck defects: anatomical study and clinical applications.  CH Wong, Ong YS, KY Chew, BK Tan, Song C. Plast Recon Surg 124: 1956, 2009.
  • Treatment Strategy for Post-burn Neck Reconstruction: Emphasizing the Functional and Aesthetic Importance of the Cervicomental Angle.  YX Zhang, J Yang, DR Wang, YG Zhang, Ong YS et al. Ann Plast Surg 2010 Dec;65(6):528-34.
  • Limb salvage in Trauma.  Ong YS, LS Levin. Plast Recon Surg 125: 582, 2010.
  • An algorithm for recipient vessel selection in microsurgical head and neck reconstruction.  Chia HL, Wong CH, Tan BK, Tan KC, Ong YS. J Reconstr Microsurg 2011 Jan;27(1):47-56.
  • Modifications of the radial forearm flap phalloplasty for female-to-male gender reassignment.  C Song, Wong M, Wong CH, Ong YS. J Reconstr Microsurg 2011 Feb;27(2):115-20.
  • Large unilateral breast auto-inflation after breastfeeding linked to polyacrylamide hydrogel injection augmentation mammoplasty.  Kang GC, Ong YS. Aesth Plast Surg 2011 Feb;35(1):122-4.
  • Serratus Anterior Venous Tributary as a Second Outflow Vein in Latissimus Dorsi Free Flaps.  T Goh, BK Tan, Ong YS, W Chew. J Reconstr Microsurg 2011 Jul 27 (Epub).
  • Preferred use of the Ipsilateral Pedicled TRAM flap for Immediate Breast Reconstruction: An Illustrated Approach.  Tan BK, Joethy J, Ong YS, Pribaz JJ. Aesth Plast Surg 2011 Jul 2 (Epub).
  • The Anterolateral thigh perforator flap for reconstruction of knee defects.  Wong CH, T Goh, Tan BK, Ong YS. Ann Plast Surg 2012 Jan 5.
  • The Anterolateral thigh- Vastus lateralis conjoint flap for complex defects of the lower limb.  Wong CH, Ong YS, Wei FC. J Plast Reconstr Aesthet Surg 2012 Feb;65(2):235-9.
  • Revisiting Vascular Supply f Rectus Femoris and its Relevance in the Harvest of the Anterolateral Thigh Flap.  Wong CH, Ong YS, Wei FC. Ann Plas Surg 2012 Nov 29.
  • Radical surgical excision and use of lateral thoracic flap for intractable axillary hidradenitis suppurative.  Teo WL, Ong YS, Tan BK. Arch Plast Surg 2012 Nov;39(6):663-6.
  • Decellularized porcine saphenous artery for small diameter tissue-engineered conduit graft.  Xiong Y, Chan WY, Chua AW, Feng J, Gopal P, Ong YS. Artificial Organs, June 2013;37(6):E74-87.
  • Combined use of liposuction and arthroscopic shaver in lower limb fasciocutaneous flap contouring.  A Ooi, Ong YS, Wong CH. Journal of Plastic, Reconstructive and Aesthetic Surgery.
  • Primary treatment of mandibular ameloblastoma with segmental resection and free fibula reconstruction: Achieving satisfactory outcomes with low implant-prosthetic rehabilitative uptake.  A Ooi, Feng J, Tan HK, Ong YS. J Plast Reconstr Aesth Surg 2014 Jan (Epub).
  • Vascularisation of urethral repairs with the gracilis muscle flap.  Kua EH, Leo KW, Ong YS, Cheng C, Tan BK. Arch Plast Surg 2013 Sep; 40(5): 584-8.
  • Reverse bipaddle posterior interosseous artery perforator flap.  Zhang YX, Qian Y, Pu Z, Ong YS, Messmer C et al. Plast Recon Surg 2013 Apr;131(4);552-62e.
  • Thoracoacromial artery perforator flap: anatomical basis and clinical applications.  Zhang YX, Yongjie H, Messmer C, Ong YS et al. Plast Recon Surg 2013 May;131(5):759(e)-70e.
  • A novel design of the multilobed latissimus dorsi myocutaneous flap to achieve primary donor-site closure in the reconstruction of large defects.  Zhang YX, Messmer C, Pang FK, Ong YS et al. Plast Recon Surg 2013 May;13(5):752-8e.
  • Traumatic lower limb injury and microsurgical free flap reconstruction with the use of negative wound pressure therapy: is timing crucial?  Raju A, Ooi A, Ong YS, Tan BK. J Reconstr Microsurg 2014 Jul. 30(6):427-30.
  • Stepwise training for reconstructive microsurgery: the journey to becoming a confident microsurgeon in Singapore.  Ramachandran S, Ong YS, Chin AY, Song IC, Ogden B, Tan BK. Arch Plast Surg 2014 May. 41(3):209-12.
  • Use of the anterolateral thigh and vertical rectus abdominus musculocutaneous flaps as utility flaps in reconstructing large groin defects.  Aslim EJ, Rasheed MZ, Lin F, Ong YS, Tan BK. Arch Plast Surg 2014 Sep. 41(5):556-61.
  • Optimising Aesthetic Reconstruction of Scalp Soft Tissue by an Algorithm Based in Defect Size and Location.  Ooi ASH, Kanapathy M, Ong YS, Tan KC, Tan BK. Ann Acad Med Singapore 2015 Nov,44(11):535-41.
  • Trends in Post-Mastectomy Reconstruction in an Asian Population: a 12-year Institutional review.  Ng YY, Tan VK, Goh TL, Yong WS, Wong CY, Ho GH, Madhukumar P, Ong KW, Ong YS, Sim Y, Tan BK. Breast Journal 2017 Jan;23(1):59-66.

Research Trials