The surgical treatment of sinonasal tumors is constantly evolving. Lesions of the medial maxillary wall were traditionally approached through an external approach, usually via a lateral rhinotomy incision. With direct visualization, en-bloc resection was achieved; however, patients commonly required prolonged healing times and were left with an external scar. With the advent of endoscopic instrumentation in the 1980s, endonasal tumor surgery that respected oncologically correct resection was possible. Advantages of endoscopic resection include better visualization of the tumor, improved cosmesis, and faster healing times.