Mr Chung Sim Lim


Consultant Vascular Surgeon

Mr Chung Sim Lim is a consultant vascular surgeon and honorary clinical lecturer at the Royal Free London NHS Foundation Trust. He is also an honorary consultant at the Great Ormond Street Hospital for Children NHS Foundation Trust.

Mr Lim qualified from Barts and the London Medical School, and obtained his PhD from Imperial College London. He completed his higher general and vascular surgical training in London with placements at the Royal Free, Charing Cross and St Mary’s hospitals. He also undertook a year of senior clinical fellowship in the management of complex venous diseases at St Thomas’ Hospital in London.

Mr Lim has subspecialist interest in the management of complex venous diseases (ranging from varicose veins to deep venous diseases) and vascular malformations. His other clinical expertise includes the management of peripheral arterial diseases, diabetic foot, carotid stenosis, aortic aneurysms, lymphoedema and thoracic outlet syndrome. He is also one of the few vascular surgeons in the country with interest in vascular surgery in children.

Mr Lim’s main research interests focus on translational and clinical studies on the management of complex venous diseases and vascular malformations. He previously gained vascular biology research experience from Imperial College London and Harvard Medical School. He is currently funded by the National Institute for Health Research Biomedical Research Centre to develop a research programme that aims to characterise biomarkers, and develop three dimensional and computer simulation in the management of patients with vascular malformations.

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Hospital Locations

Royal Free Hospital

Year qualified


Country of qualification


Languages spoken

English, Cantonese and Malay


  • Vascular Surgery
  • General Surgery


  • Royal College of Surgeons of England
  • Vascular Society of Great Britain and Ireland
  • Royal Society of Medicine, British Medical Association
  • European Society for Vascular Surgeons

Procedures offered

Venous disease management:

  • Varicose vein surgery including recurrences: endovenous thermal ablation – radiofrequency (VNUS Closure Fast) and laser (EVLT), foam sclerotherapy and phlebectomies
  • Venous leg ulcer management including compression therapy
  • Deep vein interventions including intravascular ultrasound (IVUS), venoplasty and stenting
  • Deep vein thrombosis management
  • Pelvic congestion syndrome (pelvic vein reflux) management
  • Swollen leg management
Vascular malformations including venous, lymphatic and arteriovenous malformations (AVMs) management:
  • Leg/foot ulcers management
  • Peripheral arterial diseases procedures (bypass, angioplasty and stent)
  • Diabetic foot management
  • Aortic aneurysm surgery – open surgery and endovascular repair (EVAR)
  • Carotid endarterectomy
  • Lymphoedema management
  • Thoracic outlet syndrome
  • Vascular surgery in children

Clinical interests

  • Varicose veins including complex and recurrences
  • Deep venous diseases (IVC and iliac vein compression, May-Thurner Syndrome, post-thrombotic syndrome)
  • Deep vein thrombosis (DVT)
  • Vascular malformations (AVM, venous and lymphatics)
  • Swollen ankle/leg
  • Leg/foot ulcers
  • Pelvic congestion syndrome/pelvic vein reflux
  • Thoracic outlet syndrome
  • Vascular surgery in children

Research interests

Translational and clinical research in vascular surgery particularly in venous and vascular malformations.

Mr Chung Sim Lim, Consultant Vascular Surgeon is available to be seen for consultations at Royal Free London