Today, the U.S. Food and Drug Administration approved Stelfonta (tigilanol tiglate injection) to treat dogs with non-metastatic, skin-based (cutaneous) mast cell tumors (MCTs). The FDA is also approving Stelfonta to treat non-metastatic MCTs located under the dog’s skin (subcutaneous), in particular areas of a dog’s leg.  Stelfonta is injected directly into the MCT (intratumoral injection).…

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