small intestine and colon (9), and the spleen (4). One hundred thirty cases had non-Hodgkin lymphoma, of which 65 cases (50%) had primary extranodal lymphoma (P-EN). Localized cases were more often observed in P-EN than nodal lymphoma (LN). No significant difference was seen in clinical signs, laboratory data, and CR rate between P-EN and LN. In P-EN, the CR rate of those treated with both surgery and chemotherapy was higher than that of those treated only with chemotherapy. Survival for pateints with LN and P-EN were almost the same.