This mini-seminar, delivered in Spanish, is designed to provide a description of advance endonasal endoscopic surgical techniques via a case discussion format. We will include advanced surgical approaches to the maxillary, frontal, and sphenoid sinuses. We will cover the indications, key anatomical structures, and surgical pearls relevant to each case. The target audience includes international practitioners and physicians-in-training as well as US-based bilingual constituents. A panel of international subspecialized rhinologists will describe different methods through case-based examples, surgical videos, and engaging discussion.