The simultaneous appearance of Hodgkin's disease and a non Hodgkin's lymphoma is very infrequent and has classically been considered as coincidental. Nevertheless, recent clinical observations suggest that neoplastic cells which lead to Hodgkin's disease are of lymphoid origin. The case of a "discordant" lymphoma formed by a laterocervical Hodgkin's disease and a large cell gastric lymphoma is presented. The coexistence of these two diseases, as herein presented, supports the lymphoid origin of Hodgkin's disease.