http://www.ncbi.nlm.nih.gov/pubmed/18409078

There is a Chinese abstract from 2008, posted on PubMed (National Library of Medicine), on primary Non hodgkins lymphomas of the small and large intestine. Another similar abstract on lymphomas in the intestines, again from China, is from January 2010 in PubMed. From what I understand, lymphosarcomas of the small or large intestines are fairly rare in humans, but are frequently seen in cats and other animals, Most web literature concerns non-humans. Lymphosarcoma of the small or large intestine is a rare kind of Non hodgkins lymphoma, primarily of the large diffuse B cell type. Surgery and post-surgical chemotherapy is the usual treatment.