Is photodynamic therapy an appropriate treatment of feline superficial squamous cell carcinomas? Two case studies in small animal practice

Elke Vinck; B. Cagnie; H. Vinck; D. Cambier

doi:10.1117/12.544870

12 December 2003 Is photodynamic therapy an appropriate treatment of feline superficial squamous cell carcinomas? Two case studies in small animal practice

Elke Vinck, B. Cagnie, H. Vinck, D. Cambier

Author Affiliations +

Proceedings Volume 5287, Laser Florence 2002: A Window on the Laser Medicine World; (2003) https://doi.org/10.1117/12.544870
Event: Laser Florence 2002: A Window on the Laser Medicine World, 2002, Florence, Italy

Abstract

Oncological research and cancer treatment are more common in human medicine than in veterinary medicine. Nevertheless the latest decennium chemotherapy, radiotherapy and surgery also figure largely in the cancer treatment of pets. For this matter, the present study tried to explore the applicability of Photodynamic Therapy (PDT) as a proper and advantageous alternative for those treatments. PDT using topical 5-aminolaevulinic acid (5-ALA) cream was applied on superficial squamous cell carcinomas (SCC) at the nasal planum of two cats. Five hours after the cream was applied, the photosensitizing agent was removed and the sensitized area was irradiated with a red Light Emitting Diode (LED) contrivance with a wavelength of 660 nm. LED irradiation was administrated during 20 minutes, at a power output of 80 mW, with an energy density outcome of 38 J/cm². The day after ths irradiation, the tumor area became erythematous and somewhat oedematous. After two days a scab occurred. Long-term post treatment observation showed complete removal of the malign cells related with regain of normal skin structure after three weeks. Follow-up period of one year for the first case and of two months for the second case revealed no recurrence. These promising results indicate that PDT is a possible alternative method to treat superficial skin tumors. Especially when taking into account that chemotherapy and radiotherapy are time-consuming treatments and that surgery (complete removal of the nasal planum) is not an esthetical solution.

Citation Download Citation

Elke Vinck, B. Cagnie, H. Vinck, and D. Cambier "Is photodynamic therapy an appropriate treatment of feline superficial squamous cell carcinomas? Two case studies in small animal practice", Proc. SPIE 5287, Laser Florence 2002: A Window on the Laser Medicine World, (12 December 2003); https://doi.org/10.1117/12.544870

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