Dr. Jan F. Hawkins Profile

Dr. Jan F. Hawkins

at Purdue Univ

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Proceedings Article | 25 April 2005 Paper

Use of a carbon dioxide laser for surgical management of cutaneous masses in horses: 65 cases (1993-2004)

Jan Hawkins, Charles McCauley

Proceedings Volume 5686, (2005) https://doi.org/10.1117/12.587881

KEYWORDS: Gas lasers, Carbon monoxide, Carbon dioxide lasers, Melanoma, Surgery, Tissues, Laser vision correction, Laser ablation, Tumors, Laser safety

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The purpose of this study was to evaluate the outcome of horses treated for cutaneous masses with the carbon dioxide (CO₂) laser. The records of 65 horses were examined. Surgery was performed under general anesthesia or standing under sedation and local anesthesia. Excision was performed freehand using a focused beam with power settings ranging from 10 to 32 Watts in a continuous mode. Following en bloc removal of masses the subcutaneous tissue and wound margins were photovaporized using a defocused beam. Follow-up information was obtained via telephone interview with owners or referring veterinarians Cutaneous masses were divided into three groups: sarcoid (29), neoplasia including squamous cell carcinoma (15), melanoma (6), schwanoma (2), fibroma (1), and fibrosarcoma (1), and non-neoplastic masses (11). Mass reoccurrence developed in 8 of 29 (28%) sarcoids and 4 of 14 (29%) squamous cell carcinoma. No reoccurrence was reported for horses diagnosed with melanoma, schwanoma, fibrosarcoma, fibroma, or any of the non-neoplastic masses. Sixty of 63 owners (95%) reported that they were satisfied with the outcome of the procedure. This study demonstrates that the CO₂ laser is an effective means of treating cutaneous masses in horses.

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