title: Clinical case report of a large antrochoanal polyp.
abstract: Antrochoanal polyps are benign lesions originating from the mucosa of the maxillary sinus. Nasal obstruction and rhinorrhea are their main symptoms. Their endoscopical and radiological appearance makes them relatively easy to diagnose. These polyps are usually presented unilaterally, although bilateral presentation is also possible. We described two cases of atypically giant antrochoanal polyps: in a 15-year-old child and in a 38-year-old man. In both cases, the diagnosis was done by nasal endoscopy and computed tomography (CT) of the paranasal sinuses and supported by histopathological analysis. In the first patient, the excised polyp had the histological characteristic of an angiomatous antrochoanal polyp. Because of their unusual dimension, the combined transoral and endonasal endoscopic approach was performed for complete polyp excision. We discussed the clinical, histopathological and immunohistochemical characteristics of choanal polyps in comparison to inflammatory nasal polyps, and the applicable surgical techniques for treatment of these polyps.
authors.affiliation: Department of Otorhinolaryngology, Rhinology Unit, Faculty of Medicine, Military Medical Academy, Belgrade, Serbia. cecaspadijermirkovic@gmail.com.
authors.forename: Cveta
authors.initials: C
authors.lastname: Spadijer-Mirković
authors.affiliation: Department of Otorhinolaryngology, Rhinology Unit, Faculty of Medicine, Military Medical Academy, Belgrade, Serbia.
authors.forename: Aleksandar
authors.initials: A
authors.lastname: Perić
authors.affiliation: Institute of Pathology, Faculty of Medicine, Military Medical Academy, Belgrade, Serbia.
authors.forename: Biserka
authors.initials: B
authors.lastname: Vukomanović-Đurđević
authors.affiliation: Institute of Medical Research, Faculty of Medicine, Military Medical Academy, Belgrade, Serbia.
authors.forename: Ivan
authors.initials: I
authors.lastname: Stanojević
mesh_terms: D000293:Adolescent; D000328:Adult; D003937:Diagnosis, Differential; D004724:Endoscopy; D006801:Humans; D008297:Male; D008443:Maxillary Sinus; D009298:Nasal Polyps / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D059747:Nasal Surgical Procedures / Q000379:methods; D010254:Paranasal Sinus Diseases / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed
keywords: Antrochoanal polyp; Chronic rhinosinusitis with nasal polyps; Diagnosis; Endoscopic sinus surgery