Splenic masses are common in older dogs and represent a potential emergency, with haemangiosarcoma being the most feared diagnosis requiring rapid surgical decision-making.
Splenic rupture causes acute haemoabdomen with rapid cardiovascular collapse, causing significant suffering before emergency intervention. The distress of acute internal haemorrhage is significant and requires prompt analgesia and stabilisation. Owners must make rapid surgical decisions without knowing whether the mass is benign or malignant. Post-operatively, the welfare of dogs with confirmed haemangiosarcoma depends on quality of life assessment and honest prognostic discussion to inform end-of-life decisions. For dogs with benign masses, complete surgical cure offers excellent long-term welfare outcomes.