Your dog’s activity should be restricted to short leash walks only during the first two weeks of healing. Your dog may need to wear an E-collar (cone-shaped collar) or tee shirt to prevent self-trauma to the surgical site.
Benign splenic masses are effectively cured with surgery. Unfortunately, survival times with surgery alone for dogs with hemangiosarcoma could be 2–3 months or less. One-year survival is less than 10%. Ultimately dogs die from metastatic (spreading) disease. Chemotherapy may increase survival times up to 6–8 months.
Complications that may be associated with surgery include haemorrhage (ongoing bleeding), cardiac arrhythmias (irregular heart rhythm), and pancreatitis (often manifested by vomiting). An ECG to look for arrhythmias is recommended after surgery. While this may require treatment, most arrhythmias resolve within 24–48 hours.