목적: A variety of neoplasms, derived from a multitude of tissue types, can develop in the sinonasal tract of pediatric patients. Sinonasal neoplasms are classified as epithelial, mesenchymal Lymphoreticular or metastatic tumors. Many sinonasal malignant lesions might be so deep and inaccessible to get a specimen for tissue biopsy. Open transfacial, transcranial or sublabial incision approaches may be used to access these lesions, which may interfere with the facial skeleton growth. On contrary, the transnasal Endoscopic approach offers a direct easy access to reach such lesions even if they are within the paranasal sinuses, intraorbital, in the pterygoplalatine or infratemporal fossa or even intracranial. The added value of the computer navigation allows good control of the disease and avoids unnecessary morbidity associated with open procedures. We describe our experience in a variety of pediatric sinonasal invasive and malignant lesions. 방법:A series of 130 cases of sinonasal and skull base pediatric aggressive benign and malignant lesions were operated upon using endoscopic approach. we describe our experience in this field 결과:Planned protocol for the treatment of these lesions in the form of tissue biopsy, tumor debulking or even tumor removal in very selected cases could be done. 결론:The increasing expertise in the field of transnasal endoscopic surgery has expanded it's indications to include management of advanced lesions and has rendered this technique a valid alternative to the standard surgical approaches.