Harley is the 8.5 year old golden who was scheduled for a front limb amputation because of a recurring infiltrative lipoma.  He had surgeries in July 2010 and Sept. 2011.  Both times before and after surgery the mass was biopsied and found to be a benign infiltrative lipoma.  the morning of the scheduled amputation they did a routine chest xray and found two masses -- a 4 cm mass on one lung and a 6 cm mass on the other lung and the surgery was cancelled at the recommendation of the surgeon.  I met with his regular vet a few days after and just too many variables to make any kind of prediction/prognosis.  the following week I met with the oncologist at the clinic where he was to have the surgery and pretty much the same thing.  Xrays were redone and she was at least able to say yes these were in fact masses but where did they originate from.  Again not enough information.  This past Wednesday I took him back for an ultrasound and a urine test for blasto.  the blasto test was my idea just to at least rule that out.  the ultrasound of the abdominal area was actually good.  the only thing she noted was two small (about 2 cm) masses on or in the spleen which she thought could just be age.  Since they are smaller than the masses in his lungs this pretty much would rule out that they metastasized to the lungs.  Blasto just came back today as being negative.  She did contact the pathologist and ask if there was a chance that when the biopsies came back as benign lipoma could they really have been liposarcoma and he said yes.  I recall Harley's regular vet mentioning this in past (cells look very similar).  But I thought I just read that liposarcomas recur but stay local.  Is liposarcoma and soft tissue sarcoma the same thing?  Do any of you have experience with liposarcoma?  I wonder what kind of prognosis he might have?  The oncologist had left the message and she is out until Tuesday so I'm looking for some background.  and I hate to even say this, but I wonder if he would have had some chemo after the previous surgeries if he would even be facing all this now. 

Any thoughts are appreciated.