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Dutch anatomist, Ruysch first described nasal polyps arising from antrum in 1691. Similarly, Zuckerkandl, a Hungarian-Austrian anatomist in 1891, reported a case of polyp from the maxillary sinus with herniation through a widened accessory ostium. In 1906, Killian published a paper “The origin of choanal polypi” describing a polyp originating in the maxillary sinus, which is usually unilateral and solitary that extends into the posterior choana of the nasal cavity. Through the years numerous papers have been published about Killian’s polyp or antrochoanal polyp (ACP). However, there has been no written report of an unusual variant of the maxillary sinus polyp that herniates through a dehiscence or accessory ostium of the anterior fontanelle towards the nasal vestibular area, and not towards the choana. For this reason, the study is aimed to introduce a new terminology for this unrecognized presentation of polyp as “antrovestibular polyp (AVP)” and to describe the direction of AVP or ACP growth through the anterior or posterior fon-

Case Series of Antrovestibular Polyp: An Unusual Growth of Antral Polyp Toward the Nasal Vestibule Through the Anterior Fontanelle