Life Expectancy of Dogs With Spleen Tumors (2023)

Life Expectancy of Dogs With Spleen Tumors (1)

If you are wondering about the life expectancy of dogs with spleen tumors most likely your dog has been diagnosed with a spleen tumor and you are wondering what to expect. Your vet may have already discussed with you some options, but you may be looking for more information. The life expectancy of dogs with spleen tumors varies and is mostly based on several important factors such as the type of spleen tumor that is present and the dog's age. While an exact life expectancy cannot be determined due to many individual factors, by looking at some past studies and research, it is possible for some rough estimations to be drawn.

Life Expectancy of Dogs With Spleen Tumors (2)

The Two-Thirds rule

One of the biggest predictors of the life expectancy of dogs with spleen tumors is whether the tumor on the spleen is benign or malignant.

There are several types of malignant tumors of the spleen and these may includehemangiosarcomas, lymphosarcomas, leiomyosarcomas andmalignant fibrous histiocytoma.

On the other hand, benign tumors include hematomas, hemangiomas,nodular hyperplasia and splenic cysts.

According to veterinarian Wendy C. Brooks, among dogs,most spleen tumors turn end out being either benign hemangiomas or malignant hemangiosarcomas.

According to the 2/3 rule, 1/3 of spleen masses in dogs turn out being benign (hematomas) while 2/3 are malignant. Out of these latter, 2/3 of the malignant ones are hemangiosarcomas while theremaining encompass an assortment of other types of tumors.

On the other hand, according to another study, 500 spleens that were removed from dogs were analyzed. Out of the 500, 257 ( 51.4 percent) were found to be non-cancerous while 241 out of 500 (48.2 percent) were found to be cancerous and 2 (0.4%) were not classified. This gives roughly dogs an almost a 50/50 chance of having a benign tumor or a malignant one.

Difficult to Differentiate

Life Expectancy of Dogs With Spleen Tumors (3)

Both benign hemangiomas and malignant hemangiosarcomas tend to have a lot of features in common: they both tend to arise from the dog's blood vessels, and both being very vascular, have a tendency to rupture and bleed.

Both spleen tumors cause the same symptoms: dogs may develop a swelling in the abdomen due to accumulated blood (hemoabdomen), they become weak, their gums become pale and their body may become cold, some dogs may even collapse, which are all signs pointing to internal bleeding in dogs.

In several cases, when the bleeding from the dog's rupture spleen stops on its own, most dogs feel better, usually within 12 to 24 hours. While this seems encouraging, the bad news is that the bleed is likely to take place again in the future, and unless the tumor is removed, there are high risks for the bleeding to not stop next time which can cause the dog to bleed to death.

Unfortunately, differentiating a benign spleen tumor from a malignant one will requirethe spleen to be removed (a procedure known as splenectomy) and biopsied. Basically, theentire spleen should be submitted for evaluation because if sending only a part the pathologist may miss tumor cells which may provide a definitive diagnosis. While an ultrasound and fine needle aspiration of the dog's spleen could help differentiate a malignant tumor from a benign one, usually the definite answer comes from a biopsy which requires removal.

(Video) Hemangiosarcoma Dog Life Expectancy - is the Spleen Tumor Painful?

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It may be insightful though, even before considering surgery to remove the spleen, to have a chest x-ray (3 views) done so to look for signs of metastasis(cancer spread) in the lungs and to check with an ultrasound whether the heart is enlarged as a certain percentage dogs with spleen hemangiosarcomas also show a lesion in the right atrium of the heart. However, just because there islack of visible tumor spread doesn't necessarily mean that the tumor is benign, cautions Dr. Wendy C. Brooks.

"Canine splenic hematoma and hemangiosarcoma can have a similar clinical presentation and gross appearance at the time of surgery. This is because a hematoma is a component of most splenic hemangiosarcomas. However, the prognosis of these two conditions is very different."~Can Vet J. 2016 Aug; 57(8): 842–846.

Life Expectancy of Dogs with Spleen Tumors (Benign)

The good news for dogs with benign spleen tumors is the fact that, once the spleen is removed, the surgery is curative, as long as there are no complications from massive internal bleeding or surgical complications affecting survival rate.

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Life Expectancy of Dogs With Spleen Tumors (5)


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In an ideal situation, the mass is found before it even has an opportunity to bleed, therefore lowering potential complications considerably and making the surgery curative.

Dog owners may feel intimidated about their dogs living without their spleen. Fortunately, dogs can lead healthy and happy lives without it. In a sort of way, it's similar tohaving the appendix removed in humans.

Recovery is quite similar to the recovery following a spay surgery or a c-section. The affected dog typically spends a night or two in the hospital, and once home, activity should be restricted with leash walks for the first initial week.

(Video) Dog Spleen Tumor Natural Remedy - Hemangiosarcoma in Dogs

"You can never, ever, tell hemangiosarcoma by looking at it. Some of the worst, huge, bleedingtumorsI have seen on a spleen, that were causing the dog to bleed to death, came back as hemangiomas or hematomas, not hemangiosarcoma, and those dogs had a normal life span,"~Dr. Rebecca, veterinarian

Life Expectancy of Dogs with Spleen Tumors (Malignant)

Life Expectancy of Dogs With Spleen Tumors (9)

Spleen hemangiosarcomas are one the most commonly found types of cancers found in old dogs. In the case of an elderly dog with hemangiosarcoma of the spleen, an important decision will need to be made.

Having the dog undergo surgery is in any case not curative as hemangiosarcoma is a type of cancer with a tendency to spread to other organs. In many cases, by the time the dog shows symptoms, it has already spread.

While the spleen can be removed to prevent future bleeding, saving the dog from potentially bleeding to death, after the surgery is over, the prognosis doesn't get much better if the cancer has already spread, most likely to the dog'sliver, lungs or the base of the heart.

Surgery is the gold standard treatment plan for spleen hemangiosarcoma as the procedure is also diagnostic (allowing you to know if the tumor is malignant or not). The surgery is known as splenectomy and entails removal of the spleen. This alone can provide survival times roughly between 1 and 3 months.

The prognosis though tends to be somewhat better if surgery is performed before the tumor is allowed to rupture. Survival times though may be shortened if an ultrasound has shownpresence of a tumor on the heart, which also makes surgery more risky, explains veterinarian Dr. Rebecca.

When the surgery though is followed by chemotherapy these treatments combined may grant median survival times of approximately 5 to 7 months. However, as mentioned, hemangiosarcoma is a cancer that spreads to other organs, therefore 90 percent of affected dogs are still likely to succumb due to spread of cancer within 1 year.

"A dog with a splenectomy following hemangiosarcoma and no further care of any kind could live 3 months (more than 1.5 “human” years) or longer. With chemo maybe 7, and with diet, supplements, and the rest of the full spectrum plan maybe much longer. Every dog is different."~Dr. Demain Dressler

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A Personal, Yet Difficult Choice

The variances in the life expectancy of dogs with spleen tumors makes making a decision quite difficult. Based on the chances of the tumor being benign or malignant, choosing whether to do surgery or not, can be a difficult decision, especially with elderly dogs. Some dog owners feel that it's worth the effort putting the dog through surgery considering the possibility that the tumor may turn out being benign.

However, if chest x-rays/abdominal ultrasound show signs of cancer spread, then things considerably change. Some owners may still opt forremovingthe spleen and then having the dog undergo chemotherapy, but many may elect for euthanasia sooner or later, especially for elderly dogs considering the surgical risks (hemorrhage, cardiac arrhythmia and pancreatitis) and pain associated with the surgery.

As seen, the life expectancy of dogs with spleen tumors varies based on several factors. The best decision should be based on your dog's age, overall health, prognosis and your financial situation.

Did you know?According to a study published in the journalEvidence-Based Complementary and Alternative Medicine, 15 dogs suffering from hemangiosarcoma that were treated with yunnan baiyou (Imyunity)were reported to have the longest survival times (beyond a year being given no other treatment than this mushroom). There are also several successstories on the Integrative Veterinary Care Journal website.

(Video) Are Splenic Masses in Dogs Always Hermangiosarcoma? Vlog 84

Life Expectancy of Dogs With Spleen Tumors (10)

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  • Ogilvie GK, Powers BE, Mallinckrodt CH, Withrow SJ: Surgery and doxorubicin in dogs with hemangiosarcoma. JVIM 10: 379-384, 1996.
  • Hammer AS, Couto CG, Filppi J, et al.: Efficacy and toxicity of VAC chemotherapy (vincristine, doxorubicin, and cyclophosphamide) in dogs with hemangiosarcoma. JVIM 5: 160-166, 1991.
  • Wood CA, Moore AS, Gliatto JM, et al.: Prognosis for dogs with stage I or II splenic hemangiosarcoma treated by splenectomy alone: 32 cases (1991-1993). JAAHA 34: 417-421, 1998.
  • DVM360: Surgery of the spleen (Proceedings)
  • Pathologic factors affecting postsplenectomy survival in dogs. Spangler WL, Kass PH, J Vet Intern Med. 1997 May-Jun; 11(3)
  • Can Vet J. 2016 Aug; 57(8): 842–846.Outcome and prognostic factors for dogs with a histological diagnosis of splenic hematoma following splenectomy: 35 cases (2001–2013) Steve G. Patten,Sarah E. Boston, andGabrielle J. Monteith


How fast does spleen cancer spread in dogs? ›

Malignant splenic masses frequently metastasize to the liver or heart. Either one is bad news, but you may find comfort in the certainty of the knowledge that your dog's prognosis is poor. Most dogs with malignant splenic masses succumb to their disease within a few months, sometimes even weeks, of surgery.

How Long Can dogs live with splenic hemangiosarcoma? ›

However, the prognosis of these 2 conditions is very different, with a poor prognosis in canine splenic hemangiosarcoma due to early and aggressive metastasis (7). With splenectomy alone, the reported median survival time is 86 d with an estimated 1-year survival rate of 6.25% (8).

Is spleen cancer painful for dogs? ›

Dogs with splenic cancer are at high risk of loss of blood from a bleeding tumor, especially those with hemangiosarcoma. Are spleen tumors in dogs painful? Dogs may be in pain, especially if the tumor ruptures. Occasionally they are asymptomatic.

What are end stages of hemangiosarcoma in dogs? ›

Some signs your dog is dying from hemangiosarcoma include:

Pale gums. Rapid heartrate. Panting, difficulty breathing, or a dog who is breathing fast. Weakness and collapse.

Should I euthanize my dog with hemangiosarcoma? ›

Dogs in a late stage of the disease may have difficulty breathing, display unusual neurological activity, seizure or suddenly collapse. If your dog is in this situation then it is considered an emergency as they are likely dying of hemangiosarcoma; euthanasia is often the most humane option at this point.

What are the symptoms of spleen cancer in dogs? ›

Most dogs presenting with this cancer are brought to their veterinarian by their owners on an emergent basis due to a range of nonspecific clinical signs such as: decreased appetite, weight loss, lethargy, increased/labored breathing, swelling of the abdomen, and acute collapse/weakness.

Do dogs with hemangiosarcoma suffer? ›

The disease is indolent; in other words, it does not cause pain and the rate of growth in the early stages is relatively slow. Dogs harboring even large hemangiosarcomas may show no clinical signs or evidence that they have a life threatening disease.

How quickly does hemangiosarcoma spread in dogs? ›

Treatment and Prognosis of Hemangiosarcoma

Surgery is the primary method of treatment for most dogs with hemangiosarcoma, regardless of the location of the primary tumor. In most of these patients, the cancer will spread to other sites throughout the body 1-3 months after surgery.

What is the average survival time for a dog with splenic hemangiosarcoma treated with surgery alone? ›

The mainstay of treatment is removal of the spleen via surgery. Following surgery, chemotherapy is strongly recommended due the aggressiveness of HSA and the short survival time with surgery alone (1-3 months).

What is the life expectancy of a dog with hemangiosarcoma? ›

Even when a tumor is quickly detected and removed, the outlook for dogs with hemangiosarcoma is grim. Statistics show that: Average survival time with surgery alone is one to three months. Average survival time with surgery and chemotherapy is five to seven months.

What does a mass on a dogs spleen mean? ›

Up to 2/3 of dogs with splenic masses have a malignant tumor (2/3 of these are hemangiosarcoma). Dogs with a ruptured splenic mass requiring a blood transfusion are more likely to be diagnosed with hemangiosarcoma. The remaining patients have benign masses that are effectively treated with splenectomy.

What causes a mass on a dog's spleen? ›

Hemangiosarcoma in dogs is the most common type of splenic cancer. Splenic hematoma – Trauma to the abdomen and damage to blood vessels in the spleen cause this large encapsulated blood clot to form. Lymphoma – This type of cancer can be found in the spleen but in most cases, the entire spleen is enlarged or swollen.

Why did my dog get hemangiosarcoma? ›

In most cases, the cause of hemangiosarcoma is unknown. Exposure to sunlight can cause skin tumors in some dogs, especially in thinly haired regions including the belly, inner thighs, and eyelids.

Has any dog survived hemangiosarcoma? ›

We report a case of a 6.5-year-old dog diagnosed with a splenic hemangiosarcoma and treated solely with micronized fenofibrate, administered orally once a day following splenectomy. The dog survived for over 26 months (804 days) after initial diagnosis without signs of adverse effects due to fenofibrate treatment.

How do you tell if a dog is internally bleeding? ›

Common signs of internal bleeding include weakness, trouble breathing, pale gums, a distended abdomen, and collapse. Less common signs are vomiting, not eating, and general malaise.

How fast does dog cancer progress? ›

A dog is lucky to get 3 to 6 months, points out veterinarian Dr. Andrea Robert. In some cases, it can even be less, even just one single month. The secondary cancers in the liver can start to bleed within a very short time.

How long can a dog live with a benign spleen tumor without surgery? ›

Median life expectancy of dogs with benign lesions was 436 days, which was significantly longer than the 110 days found in the group with malignant splenic tumors.

How long can a dog live with a damaged spleen? ›

The average patient following a diagnosis of splenic hemangiosarcoma will only have a life expectancy of around 3 months.

How do you tell if a dog is bleeding internally? ›

Common signs of internal bleeding include weakness, trouble breathing, pale gums, a distended abdomen, and collapse. Less common signs are vomiting, not eating, and general malaise.


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