Key estimates

• For mixed splenic masses, one study reported an overall median survival time of 647 days, but this includes different diagnoses and outcomes varied widely from 0 to 3,287 days .

• For splenic hemangiosarcoma, prognosis is much poorer; one source reports median survival with surgery alone around 19–86 days, with 1-year survival around 6%–12% .

• In dogs with stage I or II splenic hemangiosarcoma treated with splenectomy alone, one study looked at dogs that survived the first 7 days after surgery and reported median survival for that group, but the available snippet does not provide the exact number .

• In a study of small-breed dogs with splenic hemangiosarcoma, median survival was 116 days for small dogs and 97 days for large dogs; dogs treated with surgery plus chemotherapy had median survival of 207 days and 139 days respectively .

What this means practically

• If pathology comes back benign: prognosis may be better than with hemangiosarcoma, but these sources do not give a precise life-expectancy estimate for benign-only cases .

• If pathology comes back hemangiosarcoma: surgery may help control bleeding and give more comfortable time, but average survival is often short even after surgery .

• If there is already spread/metastasis, prognosis depends on staging, so the exact life expectancy needs your vet’s staging results .

Ask the vet now

• “Based on ultrasound/chest imaging, do you see signs of spread?”
• “If pathology is benign, what life expectancy do you expect?”
• “If it is hemangiosarcoma, what survival do you expect with surgery only vs surgery plus chemo?”
• “Is the goal of surgery to cure, or mainly to prevent rupture and keep him comfortable?”

Key estimates

• For mixed splenic masses, one study reported an overall median survival time of 647 days, but this includes different diagnoses and outcomes varied widely from 0 to 3,287 days .

• For splenic hemangiosarcoma, prognosis is much poorer; one source reports median survival with surgery alone around 19–86 days, with 1-year survival around 6%–12% .

• In dogs with stage I or II splenic hemangiosarcoma treated with splenectomy alone, one study looked at dogs that survived the first 7 days after surgery and reported median survival for that group, but the available snippet does not provide the exact number .

• In a study of small-breed dogs with splenic hemangiosarcoma, median survival was 116 days for small dogs and 97 days for large dogs; dogs treated with surgery plus chemotherapy had median survival of 207 days and 139 days respectively .

What this means practically

• If pathology comes back benign: prognosis may be better than with hemangiosarcoma, but these sources do not give a precise life-expectancy estimate for benign-only cases .

• If pathology comes back hemangiosarcoma: surgery may help control bleeding and give more comfortable time, but average survival is often short even after surgery .

• If there is already spread/metastasis, prognosis depends on staging, so the exact life expectancy needs your vet’s staging results .

Ask the vet now

• “Based on ultrasound/chest imaging, do you see signs of spread?”
• “If pathology is benign, what life expectancy do you expect?”
• “If it is hemangiosarcoma, what survival do you expect with surgery only vs surgery plus chemo?”
• “Is the goal of surgery to cure, or mainly to prevent rupture and keep him comfortable?”