Kay Thomas

Consultant urological surgeon and deputy medical director


Kay Thomas has been a consultant at Guy's and St Thomas' NHS Foundation Trust since 2006.


  • has established a unique multidisciplinary clinic for the management of cystinuria
  • performs percutaneous and uretero-renoscopic surgery for stones throughout the urinary tract, using laser and ultrasonic lithotripsy
  • supervises extracorporeal shock wave lithotripsy (ESWL) in the Stone Unit at Guy's Hospital
  • trained in ultrasound and performs her own scans

Kay is an expert in the endoscopic management of bladder cancer. She:

  • is co-investigator for the 'blue light' photodynamic diagnosis of new bladder tumours
  • performs flexible uretero-renoscopy for the surveillance and treatment of tumours involving the upper urinary tract.
  • introduced endoscopic laser ablation of bladder tumours under local anaesthetic

Kay is the deputy medical director for transplant, renal and urology services.

Education and training

  • Fellowship (urology) of the Royal College of Surgeons
  • MD
  • Medicine and surgery (MBBS), Charing Cross and Westminster Medical School, Imperial College London, 1994

Research interests

  • New methods of managing and preventing cystine stones
  • Passive acoustic sensor (stone stethoscope) a new sensor which may be able to detect which stones respond to lithotripsy
  • Defining outcome measures for stone surgery
  • 'Blue light' photodynamic cystoscopy for new bladder tumours
  • Improving treatment of bladder cancer by developing new techniques and equipment

Last updated: July 2023

Is this page useful?