Outcome of Metastatic and Recurrent Ovarian Dysgerminoma Using Radiation Therapy and Chemotherapy in a Dog.

An 8 yr old female spayed poodle/terrier mixed-breed dog was referred for evaluation of a recurrent and metastatic ovarian dysgerminoma. A total dose of 20Gy was administered to both the mediastinal metastatic lesion and retroperitoneal recurrent dysgerminoma in five daily fractions of 4Gy. Acute side effects were mild and self-limiting. This was followed by several courses of chemotherapy using a variety of agents. Despite extensive disease, this patient was still alive at the time of publication, 524 days after presentation and 501 days following completion of radiation. This case report demonstrates tolerability and efficacy of palliative radiation and chemotherapy for this rare tumor type.