Clinical research on the surgical treatment of complex maxillary sinus diseases by pyriform aperture extend prelacimal recess approach

The aim of this study is to explore the operative method, indication and clinical effect of enlarging anterior lacrimal Fossa via Piriform foramen for complex lesions of maxillary Sinus. By imaging and pathology, twenty-one patients with tumors and bone cysts were confirmed that the lesion base was located in the anterior wall of maxillary sinus, alveolar recess and zygomatic recessor even more broadly. All patients were treated with pyriform aperture extend prelacimal recess approach surgery, and followed up for average 25 months. All the 21 operations went smoothly, including 11 cases diagnosed with papilloma, 4 cases diagnosed with maxillary sinus carcinoma, 1 case diagnosed with moderate dysplasia, 1 case diagnosed with fibroangioma, 1 case diagnosed with schwannomas, 1 case diagnosed with maxillary sinus osteoma, 1 case diagnosed with maxillary sinus bone cyst and 1 case diagnosed with dentigerous cyst. Pyriform aperture extend prelacimal recess approach can thoroughly deal with lesions located in each p