Panel Discussion – Tumor Margins in Dogs & Cats

Small Animals

Panel Discussion
Date: Sat 31st Jan 2026
Venue: On-Demand Panel Discussion
Contact Hours: 3 Hours
Course Language: English
  • Net price, no tax will be added*
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Qualified Vet USD 95.00 -
Veterinary Student USD 40.00 -
Intern/Resident (Requires Proof of Status) USD 75.00 -
Vet. Nurse / Vet. Technician USD 75.00 -
Early Booking Deadline: Wednesday 1st January 2020
Registration Deadline: Saturday 31st January 2026

* VAT (= MWST/MOMS/SALES TAX) will only be added for certain UK vets attending courses abroad and for all attendees when attending courses in the UK.


Panel Discussion – Tumor Margins in Dogs & Cats (Recorded 28 January 2021)


Panelists:Barbara PowersDVM, PhD, DACVP – Antech Diagnostics, USA
Julius Liptak  BVSc, MVetClinStud, FACVSc, DACVS-SA, DECVS – Alta Vista Animal Hospital,
Nick Bacon   MA, VetMB, CertVR, CertSAS, DECVS, DACVS, FRCVS – Fitzpatrick Referrals,
Small Animal Specialist
Hospital, Australia
Moderator:David Vail   DVM, MS, DACVIM (ONCOLOGY) – University of Wisconsin-Madison,


Taking appropriate actionable steps (treatment vs. active surveillance) based on intra-operative gross surgical margin assessment and post-operative histological evaluation could make the difference between a durable/curative outcome or a devastating early recurrence in your cancer patients following surgical resection.   The panel of world-renowned surgical and medical Oncologists and Pathologist will focus their discussions on the following tumors on which differing views are widespread:

  • Extremity Soft Tissue Sarcomas – Marginal vs. Wide Surgical Resection
  • Mast Cell Tumors – Metric vs. Proportional Surgical Margins
  • Histologic Margins – Making sense of narrow or close margins

The above topics are addressed via an exchange of discussion points and case-discussions  debated between the 3 panelists.  The discussion will conclude with an interactive discussion on what actionable steps can and should be taken based on the result of margin assessment.


Panel Discussion Registration Process:    Once you have registered and upon payment, you will receive the link to access the on-demand recording for a period of 8 weeks. If you wish to receive a Certificate of Attendance after having viewed the webinar, please get in touch with us and we will send it to you electronically.


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    Barbara Powers
    DVM, PhD, Dipl.ACVP

    United States

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    Barb graduated from Purdue University with her DVM in 1981. She then did a one year small animal internship at Colorado State University, and subsequently completed her pathology residency and PhD in 1986, becoming ACVP board certified in 1987. Barb then joined CSU’s Animal Cancer Center as pathologist and researcher in cancer and radiation pathology for 10 years. In 1996 she became Director of CSU’s Veterinary Diagnostic Laboratories, serving in that position for 22 years. She was president of Colorado Veterinary Medical Association from 2003-2004 and president of the American Association of Veterinary Laboratory Diagnosticians (AAVLD) from 2006-2007. She served on AAVLD’s Accreditation Committee from 1998-2010.

    At CSU, she and her colleagues validated an ELISA for Chronic Wasting Disease (CWD) in cervids and established one of the country’s largest CWD testing centers. She cochaired the committee on the National Animal Health Laboratory Network from 2008-2018, helping to secure federal funding. Barb has authored or co-authored over 210 publications, mostly related to small animal oncology, radiation pathology or orthopedic pathology. Barb joined ANTECH in 2018. Her areas of interest are oncologic pathology, equine endometrial pathology, oral pathology and orthopedic pathology.

    In her free time Barb enjoys spending time in her mountain log home that her husband built, spending time with her dogs, Summer and Tango, hiking, and gardening.

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    Julius Liptak
    BVSc, MVetClinStud, FACVSc, Dipl.ACVS-SA, Dipl.ECVS


    European & American Specialist in Small Animal Vererinary Surgery
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    Dr. Julius Liptak has a passion and commitment to surgical oncology. He developed this interest prior to and during his residency training in Australia. Dr. Liptak was then selected as Fellow in Surgical Oncology at the Animal Cancer Center at Colorado State University, the best recognized and one of the only training programs in the world for veterinary surgical oncologists. Dr. Liptak is an internationally recognized surgical oncologist. He is the co-editor of the seminal veterinary oncology textbook, Withrow and MacEwen's Small Animal Clinical Oncology, with Drs. Vail and Thamm. With three colleagues, Dr. Liptak is also writing the first edition of A Color Atlas of Surgical Oncology of Dogs and Cats. He has over 100 publications in veterinary and human peer-reviewed journals and veterinary textbooks; and is either the first or supervising author on seminal papers on oncologic diseases such as hepatocellular carcinoma, retroperitoneal sarcomas, and chest wall tumors, and surgical procedures including chest wall resections and reconstructions, rectal pull-throughs, and ventral bulla osteotomies.

    Dr. Liptak was the founding President of the Veterinary Society of Surgical Oncology. In 2010 he was awarded the Stephen J. Withrow Award for Advancing the Art and Science of Surgical Oncology. In 2012, Dr. Liptak became an ACVS Founding Fellow in Surgical Oncology - one of four in Canada and less than 70 in the world. In 2020, Dr. Liptak was accepted as a RCVS Specialist in Surgical Oncology, one of six in the world. His main interests centre around musculoskeletal oncology and include bone tumors, maxillofacial surgery for oral tumors, chest wall resection and reconstruction for rib tumors, and soft tissue sarcomas, but also soft tissue tumors such as apocrine gland anal sac adenocarcinomas. Dr. Liptak is one of the pioneers in sentinel lymph node mapping and using patient-specific, customized 3D-printed titanium prostheses for oncologic reconstructions.

    Dr. Liptak is committed to providing optimum care for animals with cancer and their owners, continuing to provide education to veterinary professionals to optimize the treatment of cancer in animals, and improving the outcome for animals (and people) with cancer through education and research.

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    Nick Bacon
    MA, VetMB, CertVR, CertSAS, Dipl.ECVS, Dipl.ACVS, FRCVS

    United Kingdom

    European & American Specialist in Small Animal Vererinary Surgery
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    Professor Nick Bacon completed a residency in Small Animal Surgery at Cambridge University, a Fellowship in Surgical Oncology at the Animal Cancer Center at Colorado State University and spent 9 years as Surgical Oncology Faculty at the University of Florida, becoming Head of Oncology. In 2014 he moved back to the UK and was appointed Professor of Surgical Oncology at the University of Surrey School of Veterinary Medicine and co-founded Fitzpatrick Referrals Oncology and Soft Tissue, now AURA Veterinary, in Guildford, Surrey. AURA Veterinary has the largest and most experienced team of medical, surgical and interventional oncologists in the country and treats patients from across the UK and mainland Europe.

    Nick is a Diplomate of the European and American Colleges of Veterinary Surgeons, a Past-President of the Veterinary Society of Surgical Oncology, and an ACVS Founding Fellow of Surgical Oncology. He has been awarded specialist status in Surgical Oncology by the Royal College of Veterinary Surgeons (RCVS) and was appointed a Fellow of the RCVS due to his Contribution to Clinical Practice. Nick is a founder member of the Oncology Working Group of the World Small Animal Veterinary Association (WSAVA), and is on the Specialist Advisory Board for the veterinary homeless charity StreetVet.

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    David Vail

    United States

    American Specialist in Internal Medicine (Oncology)
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    Dr. David Vail received his DVM from the University of Saskatchewan in 1984 and completed an internship in small animal medicine and surgery at Colorado State University prior to practicing in his native western Canada for two years. He completed a residency in Medical Oncology at the Animal Cancer Center at Colorado State University in 1990. Dr. Vail has served as President of the Veterinary Cancer Society, Chairman of the Scientific Advisory Boards for the Morris Animal Foundation and the ACVIM Foundation, President of the Canine Comparative Oncology and Genomics Consortium (CCOGC), and past North American journal editor for Veterinary and Comparative Oncology. He is a founding member of the Comparative Oncology Trials consortium.

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    Neil Christensen


    American Specialist in Radiation Oncology
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    Neil received his Bachelor of Veterinary Science from the University of Sydney with honours and the university medal in 2008. Following veterinary school, he undertook an internship at the Veterinary Specialist Centre in North Ryde. He then completed a Medical Oncology residency at the Veterinary Specialist Centre and SASH. During this residency he became extremely interested in Radiation Oncology. This pursuit led him to a Radiation Oncology residency at the University of Wisconsin-Madison. In 2014 he became board certified by the American College of Radiology in Radiation Oncology and accepted a faculty position at the University of Wisconsin-Madison. In 2016 Neil became a Fellow of the Australian College of Veterinary Scientists in Medical Oncology making him a specialist in both radiation and medical oncology. Most recently Neil was an Assistant Professor of Radiation Oncology at the University of Wisconsin-Madison.

    Outside of work Neil spends his time with his two geriatric cats. They are all enjoying settling back into Sydney!

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