Therapeutic Options for Thymoma in the Rabbit

Thymomas are relatively rare tumors that have been reported in a number of rabbits. Clinical signs may be nebulous or a result of the effect of the tumor on the occupied space. Diagnosis is made by aspiration cytology or tissue biopsy and histopathology. Treatment options for thymomas in people and animals include surgery, chemotherapy, and radiation therapy. Surgery appears to offer the best chance for cure and is recommended when possible; however, radiation therapy may also be effective. Chemotherapy alone appears to have limited utility, at least in the rabbit. This article will discuss these treatment options and their use in rabbits with thymoma, both as reported in the literature and based on our experience.