An 8-year-old ferret was brought to the clinic, who refused food and water, he was exhausted. On clinical examination, the abdomen was greatly enlarged; on palpation, a compaction was felt in the abdominal cavity.
A diagnostic laparotomy was performed, as a result of which a tumor of the spleen was found. An urgent operation to remove the spleen was performed and a restorative treatment course was prescribed. A month after the operation, the ferret is doing well, has gained weight and has fully recovered.