Antrochoanal polyp (ACP) are benign lesions that originate from the mucosa of the maxillary sinus, and extend into the nasal cavity to reach the choana and nasopharynx. The treatment of ACP is surgical, endoscopic medial maxillectomy (EMM) is one of the options for surgical therapy. ACP generally affects adolescents but in this case by adults. To report and analyze ACP in adult patient with EMM technique. A 45-year-old man with an ACP completely removed by EMM technique. The evidence-based literature regarding the ACP, their management, and its complications were conducted on the Pubmed Medline, PMC and Google Scholar database. Based on the inclusion and exclusion criteria, two studies were found relevant to our case. From sources in two journals, both are retrospective studies with the ACP completely removed with endoscopic medial maxillectomy technique and the other is a retrospective descriptive study. Complete ACP removal with the EMM technique. There was no complications during and after surgery and we had no recurrences during the control period.