Transnasal endoscopic removal of an extensive immature teratoma in a three-month-old child.

The use of endoscopy in the paranasal sinuses has grown and diversified in the past few years. We present a case of an immature malignant teratoma originating from the sinuses, with intracranial extension to the middle and posterior fossae, that was managed and removed endoscopically. At the age of 2 months, the patient was hospitalized for respiratory instability.