A Case of Recurrent Inverted Papilloma of the Maxillary Sinus Resected Using “the Direct Approach to the Anterior and Lateral Part of the Maxillary Sinus with an Endoscope”

The endoscopic Denker’s approach and the Caldwell-Luc approach (CL approach) are useful approaches that allow broad access to the maxillary sinus, especially, to lesions present in the anterior wall of the maxillary sinus. However, these techniques have their own inherent obstacles; for example, the endoscopic Denker’s approach requires removal of the piriform aperture, and the CL approach needs a sublabial incision. Recently, a new approach called “direct approach to the anterior and lateral part of the maxillary sinus with an endoscope (DALMA)” was reported by Omura et al. The DALMA method allows endoscopic access to the anterior wall of the maxillary sinus without the need for a sublabial incision or removal of the piriform aperture. We report a case of recurrent inverted papilloma of the maxillary sinus that could not be resected by endoscopic modified medial maxillectomy (EMMM), but was resected using DALMA. DALMA is an effective and minimally invasive method that can be used as an alternative to the CL approach.