Cerebral heterotopia appearing as an extranasal polyp.

Cerebral heterotopia represents a rare tumorlike lesion related in its development to the encephaloceles but differing from these by non-connection to the cranial cavity. We describe an unusual case of cerebral heterotopia appearing as a pedunculated polyp on the upper lip of a newborn. As the distinction between encephaloceles and cerebral heterotopias is based on the correlation of radiologic and clinical findings, the surgical treatment of tumorlike lesions of the nasal and pharyngeal region in children requires a careful preoperative evaluation of their possible connection to the cranial cavity.