Study population data, response to treatment, number of injections, incidence of local reactions, follow-up, additional intervention data for 11 horses (12 eyes) receiving perilesional injections of IFNα2b for periocular squamous cell carcinoma (PSCC) tumors every two weeks starting at time 0 for a total of four to six injections. This evidence concerns the gene IFNA2 and squamous cell carcinoma of penis.