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Clin Asst Prof Mok Chi Wei

Clin Asst Prof Mok Chi Wei

MBBS, M.Med (Surg), FRCSEd (General Surgery)


Specialty: General Surgery

Conditions Treated by this Doctor:
3D-breast Tomosynthesis, Atypical Hyperplasia, Breast Cancer, Breast Cancer (Breast Health), Breast Cancer and Reconstruction, Breast Infection, Breast Lumps, Breast Pain, Breast Reconstruction, Breast Screening – Self-Exam and Mammogram, Digital Mammography, Duct Ectasia, Fibroadenoma, Fibrocystic Change, Gynaecomastia, Intraductal Papillomas, Lobular Carcinoma in Situ, Mammography, Mammography, MRI-Guided Breast Biopsies, Nipple Discharge, Oncoplastic Breast Surgery, Phyllodes Tumour, Ultrasonography, Ultrasound Breast Elastography, Vacuum-Assisted Breast Biopsy.

Clinical Appointments

  • Consultant SingHealth Duke-NUS Breast Centre
  • Consultant Surgery Changi General HospitalChangi General Hospital
  • Consultant Breast Surgery Changi General HospitalChangi General Hospital


Dr Mok Chi Wei graduated with a Bachelor of Medicine and Bachelor of Surgery (MBBS) on a Dean’s list in 2010 and subsequently joined Singhealth General Surgery Residency Programme from 2012 to 2017 for his postgraduate training. He was accredited as a specialist in general surgery in September 2017, with the fellowship examinations of the Royal College of Surgeons of Edinburgh (General Surgery), before sub-specialising in breast surgery in particular breast cancer surgery.

He is currently a consultant in the Department of Surgery, Changi General Hospital (CGH) with a subspecialty interest in breast surgery. His clinical practice is mainly on breast diseases, both benign and malignant. He completed his advanced fellowship in oncoplastic and minimally invasive (endoscopic and robotic) breast surgery. Dr. Mok also believes that the appearance of the breast after cancer resection is extremely important, and has developed two new minimally invasive breast surgery techniques, namely 3D Endoscopic Subcutaneous Mastectomy for treatment of gynaecomastia as well as Endoscopic-assisted ICG (EASI) technique for sentinel lymph node biopsy in breast cancer since returning from his fellowship.

Apart from his clinical commitments, he also teaches undergraduate and postgraduate students from the Yong Loo Lin School of Medicine, Duke-NUS Medical School and Lee Kong Chian School of Medicine, and he is currently appointed as a Clinical Assistant Professor with Duke-NUS Medical School.

In terms of research, Dr Mok has published extensively in breast cancer related topics and he also serves as a peer reviewer in Journal of Plastic & Reconstructive Surgery (JPRAS) and other breast and reconstructive surgery subspecialty journals. He has co-authored the first textbook on minimally invasive (endoscopic and robotic) breast surgery techniques which was published by Elsevier in January 2020.


  • 2017: Fellow of Royal College of Surgeons of Edinburgh (FRCSEd)
  • 2016: Master of Medicine (Surgery), National University of Singapore
  • 2012: Member of Royal College of Surgeons of Edinburgh (MRCSEd)
  • 2010: Bachelor of Medicine and Bachelor of Surgery (MBBS)

Professional Appointments and Committee Memberships

  • Associate Programme Director, Singhealth Post-graduate Year Residency
  • Physician Faculty, Singhealth General Surgery Residency
  • Clinical Assistant Professor, Duke-NUS Medical School
  • Clinical Lecturer, Yong Loo Lin School of Medicine
  • Clinical Teacher, Lee Kong Chian School of Medicine
  • Fellow, Royal College of Surgeons of Edinburgh


  • 2020: Singapore Health Quality Service Awards 2020 – Silver Award, Singapore Health Services
  • 2019: WOW! Award, Changi General Hospital
  • 2016: Outstanding Resident Award, Singhealth RiSE Awards Ceremony
  • 2015: Best Medical Poster (Second Prize), Eastern Health Alliance Annual Scientific Meeting
  • 2014: Top scoring abstract (Medical Poster), 34th Congress of the European Society of Surgical Oncology (ESSO), Liverpool,UK
  • 2013: Outstanding Resident Award, Singhealth RiSE Awards Ceremony
  • 2012: Best Oral Poster (First Prize), Eastern Health Alliance Annual Scientific Meeting

Research Interests

  • Breast Cancer
  • Breast Cancer Surgery
  • Breast Reconstruction
  • Breast Surgical Oncology
  • Endoscopic Breast Surgery
  • Minimally Invasive Breast Surgery
  • Oncoplastic Breast Surgery
  • Robotic Breast Surgery
  • Sentinel Lymph Node Biopsy


Original Articles
  1. Siok S Ching, Chi W Mok, Ye X Koh, Su-Ming Tan, Yik K Tan, Assessment of Surgical Trainees’ Quality of Knot-Tying. Journal of Surgical Education Volume 70/Number 1 January/February 2013
  2. Mok, C.W., Lim, S.K. and Tan, S.-M. (2018) Under-Treatment and Poorer Survival Outcomes in Elderly Breast Cancer Patients in Singapore: A Comparison with Younger Patients in a Tertiary Institution. Journal of Cancer Therapy, 9,402-416.
  3. Mok, C. W., Tan, S.-M., Zheng, Q. and Shi, L. (2019), Network Meta-Analysis of sentinel lymph node biopsy techniques in breast cancer. BJS Open, doi: 10.1002/bjs5.50157
  4. LaiH-W, ChenS-T, Mok CW, et al.Single-port 3-dimensional Videoscope-assisted Endoscopic Nipple-sparing Mastectomy in the Management of Breast Cancer. Plast Reconstr Surg - Glob Open. . Epub ahead of print 2019. DOI: 10.1097/gox.0000000000002367.
  5. LaiH-W, ChenC-Y, Mok CW, et al.Robotic nipple-sparing mastectomy: A preliminary report of a single institute and joint collective analysis of current reported series. Formos J Surg. 2019 ;52:175–182.
  6. Wu W-P, Wu H-K, Chen C-J, Mok CW et al.Higher underestimation of tumour size post-neoadjuvant chemotherapy with breast magnetic resonance imaging (MRI)-A concordance comparison cohort analysis. PLoS One. 2019;14:e0222917–e0222917
  7. Mok CW, Hing JX, Tan S-M. Single-port three-dimensional endoscopic subcutaneous mastectomy for gynaecomastia: an aesthetically superior and novel approach. Mini-Invasive Surg. Epub ahead of print 2019. DOI: 10.20517/2574-1225.2019.39.
  8. LaiH-W, MokCW, ToescaA, et al.Consensus Statement on Robotic Mastectomy: Expert Panel from International Endoscopic and Robotic Breast Surgery (IERBS) Symposium 2019. Ann Surg.;In press. Jan 2020
  9. Lai HW, Mok CW, Chang YT, Chen DR, Kuo SJ, Chen ST. Endoscopic assisted breast conserving surgery for breast cancer: Clinical outcome, learning curve, and patient reported aesthetic results from preliminary 100 procedures. European Journal of Surgical Oncology. 2020 Feb 2020.
  10. Lai HW, Chen ST, Tai CM, Lin SL, Lin YJ, Huang RH, Mok CW, Chen DR, Kuo SJ. Robotic-Versus Endoscopic-Assisted Nipple-Sparing Mastectomy with Immediate Prosthesis Breast Reconstruction in the Management of Breast Cancer: A Case–Control Comparison Study with Analysis of Clinical Outcomes, Learning Curve, Patient-Reported Aesthetic Results, and Medical Cost. Annals of Surgical Oncology. 2020 Feb 3:1-4.
  11. Lai HW, Chen ST, Mok CW, Lin YJ, Wu HK, Lin SL, Chen DR, Kuo SJ. Robotic versus conventional nipple sparing mastectomy and immediate gel implant breast reconstruction in the management of breast cancer-A case control comparison study with analysis of clinical outcome, medical cost, and patient-reported cosmetic results. Journal of Plastic, Reconstructive & Aesthetic Surgery. 2020 Feb 18.
  12. Mok CW, Hing JXJ, Shetty SS, Tan SM. Endoscopic-assisted ICG (EASI) technique for sentinel lymph node biopsy in breast cancer. Mini-invasive Surg 2020;4:xx.
  13. Hing JX, Mok CW, Tan PT, Sudhakar SS, Seah CM, Lee WP, Tan SM. Clinical utility of tumour marker velocity of cancer antigen 15-3 (CA 15-3) and carcinoembryonic antigen (CEA) in breast cancer surveillance. Breast. 2020 Aug;52:95-101. doi: 10.1016/j.breast.2020.05.005. Epub 2020 May 20. PMID: 32485607; PMCID: PMC7375621.
  14. Chi Wei Mok, Yert Li Melissa Seet and Su-Ming Tan. Breast Cancer Multidisciplinary Management during COVID-19 Pandemic: Experiences and Strategies Used by a Singapore Breast Surgical Unit. BIO Integration 2020; 1(2): 95–100.
  15. Tan SM, Melissa Seet YL, Mok CW. COVID-19 pandemic: The new normal in breast cancer management - prioritization of care from a breast surgical unit's experience in Singapore. Asian J Surg. 2021 Jan;44(1):389-391. doi: 10.1016/j.asjsur.2020.08.020. Epub 2020 Oct 10. PMID: 33189525; PMCID: PMC7547643.
  16. Mok CW, Hing JXJ, Tan SM (2020). Latissimus dorsi flap: safe, reliable and versatile workhorse flap in the era of minimally invasive breast surgery—a case series. Annals Of Breast Surgery, 4. doi:10.21037/abs-20-62
Review Articles
  1. Mok, C. W., & Lai, H. W. (2019). Endoscopic-assisted surgery in the management of breast cancer: 20 years review of trend, techniques and outcomes. The Breast, 46, 144-156.
  2. Mok CW, Lai HW. Evolution of minimal access breast surgery. Gland Surg. 2019;8(6):784-793. Doi:10.21037/gs.2019.11.16
Editorials and Case Reports
  1. Chi Wei Mok, Wai Peng Lee, Weng Leong Victor Ng, Su-Ming Tan; Intracystic papillary breast carcinoma in a male patient: a case report and review of literature, Journal of Surgical Case Reports, Volume 2018, Issue 11, 1 November 2018, rjy315,
Books and Chapters
  1. Hung-Wen Lai, Chi Wei Mok, 2020, Minimally Invasive (Endoscopic & Robotic) Breast Surgery, Elsevier ISBN 0323734065 (ISBN 13: 9780323734066)

Research Trials