+44 (0)1268 564664
24 hour veterinary and nursing care


Sarah Mason

Sarah Mason

BVSc BSc PhD CertAVP(SAM) PGCEd DipECVIM-CA [Oncol] (add Rad Oncol) FHEA MRCVS

Head of Service – Lead in General Oncology
RCVS Specialist in Small Animal Oncology
EBVS® European Veterinary Specialist in Small Animal Oncology and Radiation Oncology
RCVS Advanced Practitioner in Small Animal Medicine

Sarah graduated from Liverpool in 2007 and worked in small animal practice for 2 years before returning to Liverpool to undertake a rotating internship. She remained at Liverpool and completed a Petsavers sponsored residency in Oncology.

Sarah then worked at the University of Liverpool as a lecturer in Oncology for 2 years. In 2014 she passed the ECVIM diploma in veterinary oncology and obtained the RCVS certificate in advanced veterinary practice (Small Animal Medicine) in 2012. From 2015-2018, Sarah worked at The Queen’s Veterinary School Hospital as Principal Clinical Oncologist.

Prior to training as a vet Sarah completed a BSc in molecular biology and a PhD in cell cycle regulation at the University of Glasgow. Following this she worked as a post-doctoral researcher at Harvard Medical School.

Sarah joined Southfields Veterinary Specialists in April 2018. She became a specialist in radiation oncology by training and examination in 2019. Her areas of interest include the optimisation of chemotherapy protocols for small animal lymphoid neoplasia, radiation therapy for the treatment of small animal neoplasia and combined medical and radiation therapy.

Hall, J and Mason S.L. 2019 Limb sparing achieved by ray amputation for osteosarcoma of the left third metacarpal bone in a Labrador. Vet Rec Case Rep.  http://dx.doi.org/10.1136/vetreccr-2018-000752

Ravicini, S, Baines, S.J. , Amores-Fuster, I, Taylor, A, Mason, S.L. and Treggiari, E (2018) Outcome and prognostic factors in medically treated canine prostatic carcinomas: a multi-institutional study. Veterinary and Comparative Oncology Manuscript accepted for publication.

Benoit, J.B., Mason, S.L. Maddox, T, Blackwood, L., Killick, D., Amores-Fuster, I., Harper, A. Finotello, R: 2018 Evaluation of a multi-agent chemotherapy protocol combining lomustine, procarbazine, prednisolone (LPP) for the treatment of relapsed canine non-Hodgkin high grade lymphoma. doi: 10.1111/vco.12387

Guilliano, A., Dobson, J.M, Mason, S.L. (2017) Complete remission of an anal sac squamous cell carcinoma treated with carboplatin chemotherapy and palliative radiation: Vet Sci. Sep 14;4(3). pii: E45. doi: 10.3390/vetsci4030045

Mason, S.L., Finotello, R., Blackwood, L., (2017) Epirubicin in the treatment of canine histiocytic sarcoma: sequential, alternating and rescue chemotherapy. Vet Comp Oncol. Mar;16(1):E30-E37. doi: 10.1111/vco.12329

Mason, S.L., Fisher, C., Ressel, L., Bommer, N.X., Buckley, L.M., Nuttall, T., (2016) Presentation, clinical pathological and post-mortem findings in three related Scottish terriers with ligneous membranitis. J Small Anim Pract 57, 271–276.

Mason, S.L. (2015) Palliative treatment in Small Animal Oncology. (2016) In Practice 38: 5 http://dx.doi.org/10.1136/inp.i1869

Ainsworth, S., Carter, S., Fisher, C., Dawson, J., Makrides, L., Nuttall, T., Mason, S.L., 2015. Ligneous membranitis in Scottish Terriers is associated with a single nucleotide polymorphism in the plasminogen (PLG) gene. Anim. Genet. 46, 707–10.

Mason, S.L, Elliott J., Grant I., Cripps, P. and Blackwood L. (2014) Effects of maropitant on vomiting in dogs receiving vincristine and cyclophosphamide. JSAP 55, Issue (8) 391–398

Mason, S.L., Jepson R., Maltman, M. Batchelor, D. (2014) Trapped Neutrophil Syndrome in three U.K. Border Collies. JSAP  55(1) 57-60

Mason, S.L., Maddox, T., Lillis, S. and Blackwood L. (2013) Late presentation of canine nasal tumours in a UK hospital and treatment outcomes JSAP  54(7) 347-353

Mason, S.L., McElroy, P. and Nuttall, T. (2012) Genetics of ligneous membranitis in Scottish Terriers (letter to editor) JSAP 53(11) 668

German A.J., Holden S.L., Mason S.L., Bryner C., Bouldoires C., Morris P.J., Deboise M., Biourge V.J. (2011) Imprecision when using measuring cups to weigh out extruded dry kibbled food. Anim Physiol Anim Nutr (Berl) Jun; 95(3):368-73

Medina-Torres C.E., Mason S.L., Floyd R.V., Harris P.A., Mobasheri, A. (2011) Hypoxia and a hypoxia mimetic up-regulate matrix metalloproteinase 2 and 9 in equine laminar keratinocytes A.Vet J. Nov;190(2):e54-9. Epub 2011 Apr 1.

Floyd, R.V, Mason S. L. Proudman, C.J, German, A.J, Marples, D. and Mobasheri, A. (2007) Expression and nephron segment specific distribution of major renal aquaporins (AQP1-4) in Equus caballus, the domestic horse. Am J Physiol Regul Integr Comp Physiol. Jul; 293(1):R492-503. Epub 2007 Apr 18

Mobasheri A., Dobson H., Mason S.L., Cullingham F., Shakibaei M., Moley J.F., Moley K.H. (2005) Expression of the GLUT1 and GLUT9 facilitative glucose transporters in embryonic chondroblasts and mature chondrocytes in ovine articular cartilage. Cell Biol Int. Apr; 29(4):249-60.

Mason S.L., Loughran, O. and La Thangue, N.B. (2002) p14(ARF) regulates E2F activity. Oncogene.  21(27): 4220-30.

de la Luna, S., Allen, K. E, Mason S.L. and La Thangue, N.B. (1998) Integration of a growth-suppressing BTB/POZ domain protein with the DP component of the E2F transcription factor. EMBO J.  18:212-228.

James Elliott

James Elliott


Head of Service – Lead in Radiation Oncology
RCVS Specialist in Veterinary Oncology
EBVS® European Veterinary Specialist in Small Animal Oncology
American Specialist in Veterinary Radiation Oncology

James graduated from the University of Edinburgh and initially worked in small animal practice in England before completing a one year internship and residency in small animal oncology at the University of Liverpool. Here he underwent extensive training in the disciplines of medical oncology and radiotherapy. James holds the European College of Veterinary Internal Medicine (ECVIM) Diploma in Small Animal Oncology and is a recognised European Specialist in Small Animal Oncology and a Royal College of Veterinary Surgeons Recognised Specialist in Veterinary Oncology. He also holds the Royal College of Veterinary Surgeons Certificate in Small Animal Medicine.

Subsequent to his training, James became a lecturer in oncology at the University of Liverpool where, in addition to running busy clinics seeing cancer patients, he was also responsible for teaching undergraduate students, postgraduates undergoing oncology training, and members of the nursing team. In 2013, James joined a large referral centre where he helped to develop the oncology service. James is a member of the Veterinary Cancer Society, the European Society of Veterinary Oncology and is a regular speaker to vets on oncology topics and has published on various subjects in veterinary literature, including blood biomarkers in certain cancers, chemotherapy for canine lymphoma and canine oral mast cell tumours.

Having spent the last few years working in America in one of the most established veterinary radiation centres in the world, James is experienced in all aspects of modern veterinary radiation, clinical oncology and achieve high-level skills in treatment planning; particularly intensity-modulated radiation therapy, stereotactic radiosurgery and stereotactic body radiation therapy.

James was awarded the 2019 ACVR resident prize for his research into radiation therapy for plasma cell tumours

In his spare time James enjoys getting out and about in the countryside, music and travelling.

Slavomíra Néčová

Slavomíra Néčová


Clinician in Oncology

Slavomíra graduated from the University of Veterinary Medicine in Košice, Slovakia in July 2009. At university she completed the Erasmus exchange programme in Lyon, France. Following graduation, Slavomíra worked in general practice in Slovakia for two years.

In 2011, Slavomíra moved to the UK and worked in a first opinion practice in Wales and then in Nottingham. She joined our team in December 2012 on a rotating internship and developed a strong interest in Oncology. Slavomíra completed her oncology residency with us in February 2018.

Slavomíra has a lovely rescue dog called Orieta, whom she likes to take on hikes in the countryside.

Davies O, Spenser S, Necova S, Holmes E, Taylor A, Blackwood L, Lara-Garcia A. (2017) Intranasal melanoma treated with radiation therapy in three dogs. Vet Q. 27 (1): 274-281

Bataller L, Tamborini A, L’Eplattenier H, Necova S, Robertson E. (2017) Successful treatment of tracheal lymphoma in a Siamese cat. Journal of Feline Medicine and Surgery Open Reports  3(2) doi: 10.1177/2055116917742529, eCollection 2017 Jul-Dec

Necova S, North S. (2016) Radiotherapy in Veterinary Medicine. Veterinary Focus 26(3)

Konstantinos Rigas

Konstantinos Rigas


Clinician in Oncology

Kostas qualified from the Aristotle University of Thessaloniki, Greece. After practising in Greece as a first opinion practitioner for five years, he decided to move to the UK and specialise in Veterinary Oncology. After two years in general practice in South West Wales, he undertook a rotating and oncology internship at the Animal Health Trust, followed by a residency in small animal oncology at the University of Liverpool.

Kostas’ main interests are in haemopoietic malignancies and their management. He is also interested in the multimodal approach to malignancies in order to provide quality time for patients with their families.

Outside of work, Kostas enjoys spending time with family, studying, playing basketball and technology.

Kostas joined the Oncology team at Southfields Veterinary Specialists in July 2021.

Petros Frezoulis

Petros Frezoulis


Oncology Resident

Petros graduated from the Aristotle University of Thessaloniki, Greece in 2013. Soon after graduation, he started a two-year combined internship at the same institution. In 2016, Petros moved to the UK and worked in a busy small animal practice in Kent. In September 2017, Petros joined Anderson Moores Veterinary Specialists as a rotating clinical intern. After completion of the internship, Petros worked in general practice, joining Southfields in April 2019 as a Resident in Medical Oncology.

In his spare time, Petros enjoys travelling, going to the gym and spending time with his friends.

Begoña Pons Gil

Begoña Pons Gil


Oncology Intern


Begoña graduated from the University of Valencia-CEU in June 2010 and, during her final year rotations, she developed a strong interest in oncology. After three years in a busy general practice, Begoña undertook a rotating internship in Valencia Sur Hospital (Spain). She has also worked for the Oncology department of the University of Gran Canaria.

In October 2015, Begoña became a member of The Royal College of Veterinary Surgeons (MRCVS) and started a year working in general practice. In January 2017, Begoña started a rotating internship at the VRCC (now Southfields), followed by a specialist internship in oncology.

Begoña is currently studying for the BSAVA Postgraduate Certificate in Internal Medicine which she started in January 2019.  She is looking forward to working at Southfields again and sees her role with the Oncology team as an exciting new step in her professional career.

Outside of work, Begoña loves walking her three dogs: Ballack, Bella (German Shepherds) and her mini Shih Tzu Godo.

Susan Keefe

Susan Keefe


Senior Oncology Nurse

Susan joined us many years ago after completing a foundation degree in Veterinary Nursing & Practice Management. Prior to this she had worked in both mixed & small animal first opinion practice. She has also spent time as a volunteer, working on a rehabilitation project for monkeys and baboons.

During her time with us, Susan has completed a certificate in Small Animal Nutrition. Her main interests at work include oncology, nutrition, medical nursing and physiotherapy.

Outside work, Susan has a keen interest in horses and has owned a horse for many years. She also has a cat called Felicity.

Georgina Eves

Georgina Eves


Oncology Nurse

Georgina worked in a busy first opinion hospital for six years, during which time she completed her training and qualified as a veterinary nurse. Having joined the Southfields Veterinary Specialists team early in 2018, Georgina enjoys looking after our in-patients and is also very interested in mentoring and training new team members.

When she’s not at work, Georgina spends time with her three rescue cats, one of which she hand-reared from 1 day old. She has a very big soft spot for greyhounds too, having previously worked at a greyhound retiring/racing kennels.

Jérôme Benoît

Jérôme Benoît

DipACVR (radiation Oncology) DipECVDI add. RadOncol MRCVS

EBVS European Specialist in Veterinary Diagnostic Imaging and Radiation Oncology

President of the European Society of Veterinary Oncology (ESVONC)

Jerome graduated from the Veterinary School of Lyon, France in 2005 and completed in 2007 a rotating internship in Maisons-Alfort, France. Jerome worked for a year in private practice near Paris and at the Veterinary School of Maisons-Alfort as a radiology Professor assistant, before moving to the USA to start a residency in Radiation Oncology, at the Veterinary School of the North Carolina State University. Jerome passed his certifying examination in Radiation Oncology in 2010 (American College of Veterinary Radiology – Radiation Oncology). Jérôme is also a diplomate of the European College of Veterinary Diagnostic Imaging, Radiation Oncology (2015) and is the first RCVS-recognised expert in the field (2017).

Jerome returned to Europe and worked for 5 years as a Veterinary Radiation Oncologist at the VRCC (now Southfields) and has been working in France since 2015 in a leading Veterinary Cancer Centre. Jerome has remained a consultant for Southfields Veterinary Specialists.

Jerome has contributed to numerous scientific publications in the field of Veterinary Oncology and has been actively participating in the training of many veterinarians (GPs and interns and residents in training).

Jerome is currently President of the European Society of Veterinary Oncology (ESVONC), and a member of several other committees (ECVDI, ICRP).

Verganti S, Berlato D, Blackwood L, Amores-Fuster I, Polton G, Elders R, Doyle R, Taylor A, Murphy S. (2017) Use of Oncept melanoma vaccine in 69 canine oral malignant melanomas in the UK. Journal of Small Animal Pract. 58(1):10-16

Rzechorzek N, Smith C, Schwarz T, Liuti T, Elders R, Woods S, Lawrence J, Marioni-Henry K. (2016) Idiopathic sclerosing orbital inflammation mimicking a malignant spindle cell tumor in a dog. Clinical Case Reports 23;4(10):935-943

Johnson P, Elders R, Pey P, Dennis R. (2016) Clinical and Magnetic Resonance Imaging features of inflammatory versus neoplastic medial retropharyngeal lymph node mass lesions in dogs and cats. Vet Radiol Ultrasound. 57(1):24-32

Elders R, Holder A, Smith K, Baines S, Catchpole B. (2014) Recombinant canine IgE Fc and an IgE Fc-TRAIL fusion protein bind to neoplastic canine mast cells. Veterinary Immunology & Immunopathology 15;159(1-2):29-40

Elders R, Holder A, Baines S, Argyle D, Catchpole B. (2011) Targeted knockdown of canine KIT (stem cell factor receptor) using RNA interference. Veterinary Immunology & Immunopathology. 15;141(1-2):151-6

Elders R, Baines S, Catchpole B (2009) Susceptibility of the C2 canine mastocytoma cell line to the effects of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) Veterinary Immunology & Immunopathology 15;130(1-2):11-6

Patient case advice

We welcome all enquiries from veterinary professionals if you require pre-referral advice about a patient, even if no referral follows. Please use the Southfields VetHub or call us on 01268 564664

Making a referral

If you would like to refer a case, the quickest way is to complete our online referral form by clicking the button below.

If your case is an emergency, urgent or out of hours, please telephone us on 01268 564664