Left untreated, most dogs with lymphoma succumb to the disease in 4 - 6 weeks. (dailypuppy.com)
Cats with small tumors located on the lower jaw (mandible) that are treated with surgery have a better chance of surviving for one year; however, most will still eventually succumb to the disease. (vetspecialists.com)
Unfortunately, the average survival time even with treatment is only one year, and most dogs succumb to the disease within two years. (morrisanimalfoundation.org)