Transfacial surgery with the use of microscopic end endoscopic techniques has been used for resection malignant tumors of the paranasal sinuses and anterior skuli base. After tumor resection the dura mater injuries should be carefully closed to avoid the most common postoperative complications (encephalocele, meningocele, meningitis, intracranial abscess and pneumo-encephalus). Authors analyzed cases of tumors of nasal cavity and paranasal sinuses with extension to anterior scull base treated in ENT Department of Medical University of Warsaw. In case of smali injuries to 10 mm in diameter the reconstruction was usually performed with multi-layer technique. In cases of bigger defects the dural piane was rebuild with fascia lata flap by suturing it to the dura mater. Authors conclude that malignant tumors of the paranasal sinuses and anterior skul) base can be resected entirely, together with dura mater by the extracranial approach through a lateral rhinotomy incision.