[Primary malignant mesenchymal tumors in the head and neck area--the problems in diagnosis and therapy (author's transl)].

The problems in diagnosis and therapy of malignant mesenchymal tumors in the head and neck area are reported on. The clinical course and the pathology of these rare tumors are described. First hand experiences with certain cases--one malignant leiomyoma, two rhabdomyosarcomas (one of embryonal and one of pleomorphic type), a haemangiopericytoma, a haemangioendothelioma, a chondrosarcoma and two malignant synovialomas are detailed and compared with similar case-studies in the literature.