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Dr Buan Jun Liang Bryan

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  • Associate Consultant, Division of Colorectal Surgery, Department of Surgery, National University Hospital


MBBS (Hons) (Singapore), MRCS (Edinburgh), MMed (Surg) (Singapore), FRCS (Edinburgh)


General Surgery

Clinical Disciplines/Programmes:

Colorectal Surgery, Surgery, Surgical Oncology, Surgical Oncology (Colorectal Surgery)

Special Interests:

Colorectal Cancer, Minimally Invasive Surgery, Diagnostic and Therapeutic Endoscopy, Haemorrhoids


Dr Bryan Buan is an Associate Consultant in the Division of Colorectal Surgery, National University Hospital. Dr Buan graduated from the Yong Loo Lin School of Medicine in 2014, and commenced his General Surgery Residency training in 2017. He obtained his Fellowship of the Royal College of Surgeons, Edinburgh in 2022 and was accredited as a Specialist in General Surgery by the Specialist Accreditation Board.  

Dr Buan’s interests are in colorectal cancer and minimally invasive surgery. He is an advocate that early screening and detection of colorectal cancer can lead to improved outcomes and experiences for patients. Dr Buan is also committed to the advancement of clinical knowledge, and has published papers in peer-reviewed journals. 

Beyond his clinical practice, Dr Buan believes in paying in forward, and has demonstrated a strong commitment to medical education. He actively engages in both undergraduate and postgraduate teaching. He was a Clinical Convenor for the Final Surgery MBBS Examinations, and currently holds the role of co-director of Phase V Surgery.


  • 2022 - NUH Education Award - Good Teacher (Interactive)
  • 2021 - NUS Medicine Fortitude Award
  • 2019 - International Golden Scalpel Games 1st Runner-up

Journals & Publications

  1. Buan, B., Chang, H., Wang, S., & Chong, C. S. (2019). Adenocarcinoma in a Meckel's diverticulum presenting as a phlegmon: a case report and a review of the literature. ANZ journal of surgery, 89(4), 442-443.
  2. Mok, H. T., Ong, Z. H., Yaow, C., Ng, C. H., Buan, B., Wong, N. W., & Chong, C. S. (2020). Indocyanine green fluorescent imaging on anastomotic leakage in colectomies: a network meta-analysis and systematic review. International journal of colorectal disease, 35(12), 2365-2369.
  3. S Y Lim, R Wang, D J H Tan, Y H Chin, C H Ng, H Y Tham, B J L Buan, C S Chong. (2021). Perioperative Outcomes in Open versus Laparoscopic Surgery in Elderly Patients Undergoing Right Hemicolectomy, British Journal of Surgery, Volume 108, Issue Supplement_2, May 2021, znab134.548
  4. Buan, B., So, W. Z., Lim, X. C., & Chong, C. S. (2021). Outcomes of robotic low anterior resection versus transanal total mesorectal excision for rectal cancer. BJS open, 5(5), zrab079.
  5. Buan, B., Lwin, A., & Cheong, C. Y. (2022). Ischemic bowel from a strangulated double omental hernia. ANZ journal of surgery, 10.1111/ans.17521.
  6. Lin, S. Y., Buan, B., Sim, W., Jain, S. R., Ying Chang, H. S., Lee, K. C., & Chong, C. S. (2022). Side-to-side versus end-to-side ileocolic anastomosis in right-sided colectomies: A cohort control study. Journal of minimal access surgery, 10.4103/jmas.jmas_161_21.

Professional Memberships

  • Royal College of Surgeons, Edinburgh

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