[Malignant non-Hodgkin's lymphoma at a dental site. A case report].

: The authors report on a case of non-Hodgkin type malignant lymphoma in which signs of the disease develop initially in the upper maxilla. The authors were able to observe the patient over a period of 3 years. They used this opportunity, as follows: -to grade the tumour according to the different classification schemata proposed for these tumours, -to attempt to assess the changes and progress in drug therapy for these conditions, while at all times keeping an open mind regarding the value of results obtained in this manner.