https://www.vetsurgeon.org/f/clinical-questions/9950/spindle-cell-soft-tissue-sarcoma-in-a-rat Hello, I removed a lump on a male rat, 1.5 years that appeared just one week before the surgery. After histological analysis, it turned out that the lump is a Spindle Cell Soft Tissue Sarcoma.I know it can grow back locally. The lab is givingen-USTelligent Community 10https://www.vetsurgeon.org/thread/50034?ContentTypeID=1Thu, 24 Nov 2011 09:24:11 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:b1454c38-ff99-48ff-a5eb-7998090883e8Richard Fox<p>Trouble is not the chance of metastasis (which is usually low for that type) but the local recurrence - obtaining margins in little furries IME is difficult and that is your limiting factor so the long term prognosis as Bob says is poor if the mass extends to margins d.t. their infiltrative behaviour.</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/50031?ContentTypeID=1Thu, 24 Nov 2011 09:01:36 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:6ba58f2f-d8ef-466d-933c-d03720f0ee54Bob Russell<p>Unfortunately my experience of lump removals in rats suggest this is not an uncommon tumour and the prognosis is very guarded even with apparent wide margins.</p> <p>We have a lady that had numerous rats and was a regular supply of lump removals! She now has an atopic Bull Terrier instead!&nbsp;</p><div style="clear:both;"></div>