No worries, either is fine.
Now I must say that I am very worried about your lass.
To hear that her vet suspects that this has already spread to her lymph nodes tells us that a cancerous tumor (likely a hemangiosarcoma) is present here. This is because any other splenic mass (ie hematoma, scar tissue, etc) isn't going to affect or spread to the nodes. Only a cancer would do that.
Therefore, this is a real worry, especially as the hemangiosarcoma is a tumor that doesn't tend to be very responsive to chemotherapy. And that would be the type of treatment one would have to consider here if there has been spread through the body. We could still consider removing the primary tumor as the spleen is not a critical organ and we do tend to since there is the risk of it rupturing suddenly, but again we'd still have cancer in the body and therefore her prognosis is guarded even if we did so.
With this bad news in mind, I do want to note that survival times are not amazing even if we do everything with this type of cancer. If we were to remove the spleen, on average that only tends to give us ~2 months. And even if we had gotten to her before spread, surgery with chemo together usually only buys 6-10 months. So, it is a terrible, terrible tumor type to potentially have.
Now at this point, I would note that you could request that your vet take a fine needle aspirate or biopsy of one of her lymph nodes. We could take this from the splenic mass, but there is a risk of bleeding, so the node may be a safer option. And if they suspect spread, then we'd expect to find our tumor there and be able to confirm it. Cost-wise, aspirates tend to be ~$100-150 but this can vary a we bit by practice (though they should be able to give you an estimate at this point). As well, surgery for the splenic removal can be ~500-1000$ again subject to an individual practice's charges. And chemo would totally depend on what drugs they chose to use.
Overall, I am quite concerned to hear that we have spread to the nodes here. This just really raises worries that this is a hemangiosarcoma on the spleen. And if it has spread already, curing this is unlikely and we will be limited in what we can do to keep her comfortable.
Please take care, my thoughts are with you,