[Chondrosarcoma of the sinuses: an infrequent tumor].

The case of 69 year old male patient who developed sinusal mesenchymal chondrosarcoma is presented. At the time of diagnosis the tumor had spread into the intracranial cavity, which explains why no surgical treatment was carried out. A combined palliative treatment of chemotherapy and radiotherapy was used which did not improve the course of the tumor. The rare location of this form of tumor is discussed. Also commented on are the therapeutic--both surgical and other modalities (chemotherapy and radiotherapy)--difficulties encountered with this condition, given the little experience accumulated with it and its habitual resistance to the therapeutical regimens employed.