She trained in Plastic Surgery in London, Paris and Belgium and passed the Plastic Surgery Fellowship of the Royal College of Surgeons in 1999, FRCS (Plast). She was awarded a fellowship in oncoplastic breast surgery research at Institut Curie, Paris where she did research on the clinical outcomes of breast cancer treatment using oncoplastic techniques. She trained in oncological breast surgery at the Royal Marsden Hospital and Charing Cross Hospitals in London. Mrs Lewis has published papers on oncoplastic breast surgery and plastic surgery in peer reviewed journals and presented her work at national and international meetings. She maintains an active interest in clinical research for breast cancer treatment.

Mrs Lewis was entered into the GMC Specialist Register for Plastic Surgery in 2001. She is a consultant Oncoplastic Breast Surgeon at Charing Cross Hospital, London.

Her practise philosophy is to provide the most favourable aesthetic outcome in combination with optimal control in the treatment of breast cancer.

Her interests include all aspects of breast surgery including breast augmentation, breast reduction, surgery for breast cancer excision, congenital deformities of the breast, breast reshaping after wide local excision for breast cancer, partial and complete breast reconstruction using implants and local, pedicled or free flaps and nipple-areolar tattooing.