Cryptorchid testicular teratoma in a horse

Background: Based on the literature, the author presents the testicular neoplasms in the horses. Age predilection or influences of cryptorchidism in the development of testicular neoplasia in stallions are not clearly established. The applied surgical method of excision depends mainly on the location of the neoplasia. Objectives: Field Surgery", to prevent unfavourable outcomes or complications, necessitates good knowledge and experience of the surgeon. The aim of this report is to add some aspects to castration/excision methods of cryptorchid teratomas in the practice. Materials and methods: A unilateral cryptorchid stallion was castrated by total intravenous anaesthesia (TIVA) under practical conditions. Inguinal approach was made, but removal of the teratoma, which considered to be a testis, was difficult because of its location and size. Discussion: Based on the presented clinical case, the author recommends to create a decision tree facilitating to find the optimal surgical solution. The main aspects are: location and size of the teratoma; veterinary knowledge, routine and courage; surgery conditions (lighting, instruments, medicaments, weather conditions); assistants; diagnostic tools; price of the procedure.