COBALT-60 RADIOTHERAPY FOR TREATMENT OF SQUAMOUS-CELL CARCINOMA OF THE NASAL CAVITY AND PARANASAL SINUSES IN 3 HORSES

Three adult horses underwent aggressive treatment of squamous cell car cinoma of the nasal cavity and paranasal sinuses, using course-fractio nated cobalt 60 radiotherapy Squamous cell carcinoma of the nasal cavi ty and paranasal sinuses is not commonly diagnosed in horses. Historic ally, horses with this type of neoplasm have not been treated or have undergone some form of surgery The prognosis for longterm survival or cure has been poor. Long-term results of cobalt 60 radiotherapy were g ood to excellent and exceeded those usually reported for horses treate d surgically On the basis of these results, use of radiotherapy for th ese neoplasms is recommended.