Clinical observations on the use of BCG cell wall fraction for treatment of periocular and other equine sarcoids.

This research paper investigates the effects of BCG cell wall fraction treatment on sarcoids (a type of skin tumor) in horses. The authors find that the treatment is generally successful for smaller, isolated, and near-eye tumors but may have limitations in other situations.

Objective of the Research

• The goal of this clinical research was to assess the efficiency of a therapy using BCG cell wall fraction in oil to treat sarcoids—a kind of skin tumour—emerging on horses. The therapy was applied on seven horses having periocular (around the eye) sarcoids and five horses with sarcoids in other areas.

Main Findings

• The therapy was successful in treating periocular sarcoids or single, smaller sarcoids. It indicates that the BCG cell wall fraction treatment can be effective for treating certain types of sarcoids, particularly those that are small and isolated, or those located near the eyes.
• The treatment was less effective for sarcoids that had been previously treated with cryosurgery. Cryosurgery is a method that uses extreme cold to destroy abnormal tissue. The reduced efficacy of the BCG cell wall fraction treatment in these cases might originate from the prior use of cryosurgery, suggesting that the two forms of treatment may not work well together.
• One horse with a sarcoid on the stifle (an area on the hind leg) developed a septic gonitis—a condition involving inflammation of a joint—because of the necrosis (cell death) of the sarcoid tissue near the joint. This could mean the therapy may induce complications when applied to sarcoids near joints.
• Sarcoids located in the axilla (underarm area) of horses appeared to be more aggressive than those found elsewhere and did not respond positively to the BCG cell wall fraction treatment. It implies that the therapy might not be suitable for treating more aggressive forms of sarcoids or those located in specific areas like the axilla.

Implications of the Study

• This study provided valuable insights into the effectiveness and limitations of BCG cell wall fraction treatment in addressing equine sarcoids. By identifying factors that may affect response to the therapy, such as tumor size, location, previous treatments, and nature of the sarcoids, the study can contribute to improving treatment strategies for equine sarcoids in the future.