The spleen is situated on the left side of the abdomen, close to the stomach. It is smaller in size than the liver but larger than a kidney.Click to see full answer. Likewise, people ask, what are the symptoms of spleen cancer in dogs? Symptoms and Types Weight loss. Weakness. Lameness. Intermittent collapse. Muscle incoordination (ataxia) Partial loss of movement (paresis) Seizures. Dementia. Also Know, can a dog live a normal life without a spleen? Despite all of the spleens functions, dogs can live normally without their spleen. Most dogs never have a problem. There are a few infections that affect red blood cells that occur more in dogs without their spleen but the incidence is low. Subsequently, one may also ask, what causes an enlarged spleen in a dog? Causes. A variety of things are known to cause an enlarged spleen including an abdominal injury, canine hepatitis, infectious disorders, inflammatory bowel disease, bacterial infection, cell tumors of the spleen, and other immune disorders.How long can a dog live with an enlarged spleen?Unfortunately, hemangiosarcoma is a very serious and debilitating cancer. The average patient following a diagnosis of splenic hemangiosarcoma will only have a life expectancy of around 3 months.