Endoscopic Endonasal Surgery (EES) can successfully be carried out for benign tumors such as osteomas, benign vascular tumors, pituitary adenomas, pneumoceles and benign fibrous tumors. This report concerns a Belgian perspective documenting our experience in 49 such cases. Among them are 33 cases of pituitary adenoma. Thanks to the experience accumulated in the surgical management of inflammatory sinusal disease, these tumors were able to be removed, totally or partially, under endoscopic guidance with the aid of powered endoscopic instrumentation, and in some cases, CO2 laser fiber. Advantages are well-known; lower cost, shorter stay in hospital, lower morbidity, lower cosmetic or functional disabilities. We emphasize the need for the surgeon to be able to switch the endoscopic procedure to an external one if difficulties occur or the tumor is more extensive than expected.