My 9 yo female has a large mass on her spleen and several small masses on her lungs. The vet performed an x-ray and ultra-sound and determined that these are most likely malignancies. She also said it is most consistent with hemangiosarcoma. Is the splenectomy followed up with chemo worth it? Since it is a vascular organ, spleen removal most likely requires a blood transfusion. If you have gone through something similar, any feedback or advice is appreciated. Thanks.