Professor Timothy Perren is a Consultant Medical Oncologist based at St James's University Hospital, part of The Leeds Teaching Hospitals NHS Trust.

Prof Perren trained in general medicine in London and Stoke on Trent. His oncology training was in Birmingham and at the Royal Marsden Hospital, London. He was appointed consultant medical oncologist at St James's Hospital in Leeds in January 1990. He specialises in the non-surgical treatment of cancers using chemotherapy, hormonal therapy and the new targeted molecular therapies. Prof Perren believes that it is important to take into account the individual needs and situation of each patient and to involve the patient and their family closely in the development of a treatment plan.

Professor Perren specialises in the treatment of breast cancer and gynaecological cancers, including ovarian cancer, cervical cancer and endometrial cancer. He provides treatment for newly diagnosed patients, as well as for those with recurrent or metastatic disease and has gained a high degree of knowledge and understanding of difficult constellation of symptoms that can often accompany cancer and its treatment. Professor Perren’s philosophy of patient care puts the patient at the centre of treatment planning. He believes in discussing all options of treatment before finally coming up with a solution that is best for the individual concerned. 

Professor Perren is a member of various organisations and groups including: fellow of the Royal College of Physicians; He is former Chair of the Joint Colleigate Council for Oncology and Joint Specialty Committee for Medical Oncology at the Royal College of Physicians; He is a member of the   American Society of Clinical Oncology; European Society of Medical Oncology; Association of Cancer Physicians; Yorkshire Cancer Network Breast Group; Yorkshire Cancer Network Gynaecology Group;National Cancer Research Institute Gynaecological Cancer Clinical Studies Group, and the UK Breast Cancer Intergroup.

Professor David Dodwell is a Consultant Clinical Oncologist based at Leeds Cancer Centre/Institute of Oncology St James Hospital where he is Lead Clinician for Breast Services.

He is Chair of the Yorkshire Breast Cancer Research Group and holds a visiting Professorship at Sheffield Hallam University.

At Leeds General Infirmary in conjunction with his clinical and specialist nurse colleagues he has developed a service with the elements of MDT practice and meetings, prospective organisation of data collection to facilitate audit and activity analysis and protocols for diagnosis, therapy, communication and integrated follow-up.

He sees 520 new patients per year and accepts 40 cross referrals. He supervises systemic therapy and radiotherapy for patients with early and recurrent disease.

Professor Dodwell is the lead oncologist on the Sloane Group. This group audits the outcome of screen-detected DCIS within the UK. With data on over 9000 patients collected over 7 years. The group has published data on diagnostic processes, patterns of care, variability in surgical, endocrine and radiotherapeutic interventions, recurrence and mortality.

Professor Dodwell is the oncologist on the UK Breast Cancer Screening Audit Group with responsibility to contribute and co-ordinate the audit function of the UK Breast Screening Programme. Data is collected and analysed concerning all aspects of UK breast screening including patterns of care, case volume and outcome. An annual report is produced.

Within the Faculty of Clinical Oncology - Royal College of Radiologists (RCR) he is the member with responsibility for co-ordinating the functions and determining the policy of the RCR in relation to oncology including training, examinations, professional standards, audit, research, accreditation and response to national initiatives. He is co-chair of a group charged with the revision of advice to oncologists acting as expert witnesses. He chairs the Site Orientated Electronic Network for breast oncology within the RCR.

On the Joint Council for Clinical Oncology (JCCO) Professor Dodwell represents the Royal College of Radiologists. This group allows liaison and co-operation between Clinical and Medical Oncology the two specialties involved in solid tumour oncology within the UK. The predominant functions of JCCO are service configuration and standards of care.

He is involved in the development and implementation of a nationally agreed national data set on the National Chemotherapy dataset group working to capture and analyze the use of systemic therapy in solid cancer and haematology. From April 2011 the collection of this data became mandatory.

Professor Dodwell is chair on the Breast Tri-network group, which comprises of 35 breast oncologists across the Yorkshire, North Trent and East Riding Cancer Networks. They assess new interventions, determine regional policy and co-ordinate and prioritize applications to the Interim Cancer Drug Fund.

He leads the oncology group of the Yorkshire Cancer Network and has co-ordinated the implementation of guidelines for the use of aromatase inhibitors, herceptin, bisphosphonates and taxanes as adjuvant therapy. He organises the national educational meeting for this group.

He has close associations with Breast Cancer Haven (Leeds). He is involved in fundraising events and their educational programmes.

Professor Dodwell is also a member of the following groups and organisations:

Royal College of Physicians; Royal College of Radiologists; British Medical Association; British Institute of Radiology; Association of Cancer Physicians; Yorkshire Breast Group; British Breast Group; American Society of Clinical Oncology