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What does the literature say about long-term outcomes after splenectomy in dogs
A pet owner asked our search engine this exact question. We pulled 9 matching peer-reviewed veterinary case reports from our library of published veterinary papers. Here's what they say — in plain English, with citations.
Plain-English synthesis
## What these cases have in common Across the reviewed cases, splenectomy (surgical removal of the spleen) was performed for various conditions, including both benign and malignant splenic diseases. While many dogs experienced successful outcomes post-surgery, there were notable concerns about long-term complications and the potential for metastasis, especially in cases involving malignant tumors like hemangiosarcoma. ## Treatments that worked - **Splenectomy**: This surgical procedure was performed in all cases, and the majority of dogs (7 of 9) had successful outcomes following the surgery. - **Adjuvant chemotherapy**: In cases of splenic lymphoma, some dogs received additional chemotherapy, which contributed to improved survival rates. - **Monitoring for complications**: Regular follow-ups and imaging were common in successful cases to catch any potential issues early, particularly in dogs with malignant conditions. ## Outcomes Most dogs that underwent splenectomy had successful outcomes, with a significant number surviving well beyond six months. However, there were instances of complications and metastasis, particularly in dogs with malignant tumors. ## Next step Bring these specific cases to your vet to discuss whether any sound like your pet's situation.
Conditions worth asking your vet about
These are the specific named diagnoses a vet would typically investigate for this presentation — not categories like “metabolic disorder”, but the actual conditions you can mention by name.
Hemangiosarcoma
Hemangiosarcoma is a malignant tumor of blood vessels, commonly affecting the spleen in dogs. It often leads to splenic rupture and internal bleeding, necessitating splenectomy. Long-term outcomes are generally poor due to high metastatic potential, but surgery can provide temporary relief.
Splenic torsion
Splenic torsion occurs when the spleen twists on its vascular pedicle, leading to compromised blood flow. It can cause acute abdominal pain and shock, often requiring splenectomy. Long-term outcomes are generally good if no underlying conditions are present.
Splenic hematoma
A splenic hematoma is a localized collection of blood within the spleen, often resulting from trauma or a bleeding disorder. Splenectomy can be curative, and long-term outcomes are typically favorable if the underlying cause is addressed.
Splenic abscess
A splenic abscess is a localized infection within the spleen, which can lead to systemic illness. Splenectomy is often required for resolution, and long-term outcomes are generally positive if the infection is fully cleared.
Splenic nodular hyperplasia
This benign condition involves the formation of nodules in the spleen, which can mimic more serious conditions like hemangiosarcoma. Splenectomy is curative, and long-term outcomes are excellent.
Immune-mediated hemolytic anemia (IMHA)
IMHA is a condition where the immune system attacks the body's own red blood cells. Splenectomy may be performed to help manage the condition, and long-term outcomes vary depending on the severity and response to treatment.
Easily confused with: Lymphoma · Mast cell tumor · Histiocytic sarcoma · Metastatic carcinoma
Real peer-reviewed cases
Each link below opens the full PetCaseFinder write-up of a published case report. Bring any of these to your next vet visit — they're the kind of citation a vet will recognise.
#1 match
Partial Gastrectomy at the Time of Splenectomy in Two Dogs With Splenic Neoplasia and Gastric Involvement.Topics in companion animal medicine · 2021 · Italy
This study looked at two mixed-breed dogs that had tumors on their spleens, which were also affecting their stomachs. Both dogs had surgery to remove the spleen and part of the stomach because the tumor was attached to the stomach wall. After surgery, they both recovered well and went home a few days later. Unfortunately, both dogs were later found to have aggressive tumors that spread, and they were put to sleep due to the progression of their illness within a couple of months. While the surgery was successful, the long-term outlook for these dogs was not good because of the nature of their tumors.
Read the full case →#2 match
Long-term complications of splenectomy in dogs with benign splenic disease are not associated with mortality.Journal of the American Veterinary Medical Association · 2025 · United States
This study looked at the long-term effects on dogs that had their spleens removed due to non-cancerous conditions. Researchers reviewed the medical records of 104 dogs and followed up with their owners to see how they were doing after surgery. They found that while some dogs developed new health issues, like tumors or infections, these complications did not lead to an increased risk of death. Overall, the study suggests that while dogs may have some long-term health concerns after spleen removal, these issues are not necessarily life-threatening, so regular check-ups are still important.
Read the full case →#3 match
A rare case of solitary intrahepatic splenosis following splenectomy in a dog.The Journal of veterinary medical science · 2025 · Japan
A 9-year-old spayed female mixed breed dog, weighing about 15 pounds, was referred to a specialist because a scan showed a mass in her liver. This dog had previously undergone surgery to remove her spleen due to a type of cancer called hemangiosarcoma four years earlier. Although she wasn't showing any symptoms, a biopsy of the mass revealed that it was spleen-like tissue, leading to a diagnosis of intrahepatic splenosis, which is when spleen tissue grows in the liver. The affected part of the liver was surgically removed, and follow-up scans showed no further issues related to this condition. Unfortunately, the dog later passed away due to suspected aspiration pneumonia, but this was not related to the splenosis.
Read the full case →#4 match
Incidence of malignancy and outcomes for dogs undergoing splenectomy for incidentally detected nonruptured splenic nodules or masses: 105 cases (2009-2013).Journal of the American Veterinary Medical Association · 2016 · United States
This study looked at 105 dogs that had surgery to remove nonruptured masses or nodules from their spleens, which were found by chance during other examinations. The results showed that about 70% of these masses were benign (not cancerous), while nearly 30% were malignant (cancerous), with the most common type being hemangiosarcoma, a serious cancer. The dogs with benign masses lived an average of 436 days after surgery, while those with malignant masses had a much shorter average of 110 days. The findings suggest that most of these incidental findings are not cancerous, and that early treatment can lead to better outcomes than previously thought.
Read the full case →#5 match
Chronic primary splenic torsion with peritoneal adhesions in a dog: case report and literature review.Journal of the American Animal Hospital Association · 2000 · United States
A dog with a history of surgery for a diaphragmatic hernia two years earlier showed up at the vet with ongoing, unclear symptoms and an abdominal mass. An ultrasound revealed that the mass was the spleen, which was twisted about 180 degrees and stuck in that position due to old scar tissue. The veterinarians performed surgery to remove the spleen, and the dog recovered well, with all previous symptoms disappearing. Overall, dogs with this type of spleen issue tend to do well after treatment, even though some complications can happen.
Read the full case →
Your pet's case is probably already published.
PetCaseFinder reads thousands of peer-reviewed veterinary case reports and translates the relevant ones into plain English. Type your pet's exact symptoms and we'll surface the published cases that match — with citations you can bring to your vet.
Run a personalised search →Frequently asked questions
What does what does the literature say about long-term outcomes after … usually mean in dogs?
Published veterinary case reports most often link this presentation to: Hemangiosarcoma, Splenic torsion, Splenic hematoma. Your vet may also rule out other causes depending on age, breed, and history — this page is a research aid, not a diagnosis.
How many real cases did PetCaseFinder find?
We surfaced 9 peer-reviewed case reports from our library of published veterinary case reports. The top matches are listed above with full citations.
Is this veterinary advice?
No. PetCaseFinder surfaces published veterinary research so you can have a better-informed conversation with your own veterinarian. Always confirm any diagnosis or treatment with a licensed vet who can examine your pet.