[Primary non-Hodgkin's lymphoma of the maxillary sinus].

The head and neck region is one of the most common sites of extranodal non-Hodgkin's lymphoma, but it is an infrequent tumor at the paranasal sinuses site, representing no more than 5.8-8 percent of the entire malignant tumours in this localization and 0.3-2 percent of all extranodal lymphomas.

[Non Hodgkin's lymphoma of the breast].

There are described two cases of Non Hodgkin's lymphoma of the breast. The authors pointed to difficulties of histological diagnosis and paid attention that this extranodal localisation may be the first manifestation of malignant lymphoma in its subclinical phase.