Giant pleomorphic adenoma of nasal cavities and paranasal sinuses

Pleomorphic adenoma is benign tumor of the salivary glands. It is the most common neoplazm both major and minor salivary glands. Only in 1% of cases pleomorphic adenoma occur in the sinonasal cavities. The histopalogical wiew of pleomorphic adenomas originating from small salivary glands is different in higher cellularity and lower stromal component than those from major salivary glands. It is a benign tumor but it should be treated as a clinically uncertain. Malignant transformation of pleomorphic adenoma can occur in 2-10% of cases, The aim of this study was to present he case of 37-year-old patient with giant pleomorphic adenoma of the sinonasal cavities causing extensive destruction of sinuses and orbits walls.