Reevaluation of 34 cases of non Hodgkin lymphoma of tonsil and nasal cavity during ten years period were performed at Department of Pathology School of Medicine, Fukuoka University. They consisted of 28 cases from tonsil and 6 cases from nasal cavity. On immunohistochemical investigation using AB-complex and alkaliphosphatase substrat chromogen, there were found 22 cases of lymphoma of tonsil, …