71 CONGRESO AEP. Libro de comunicaciones

873 ISBN: 978-84-09-79209-2 ÁREA DE ESPECIALIDAD (MEDICINA PEDIÁTRICA)  OTROS #2436 PÓSTER ELECTRÓNICO Giant antrochoanal polyp as a rare cause of oropharynx mass in a pediatric patient: A case report Maria Fernandes Pereira, Madalena Malato, Inês Carvalho, Ana Peres Unidade Local de Saúde Estuário do Tejo. Vila Franca de Xira, Portugal INTRODUCCIÓN The antrochoanal polyp is a benign lesion originating from the edematous mucosa of the maxillary sinus. Its etio- logy is not fully understood but appears to be associated with chronic inflammation of the sinus or congenital defor- mities in its drainage. Although it accounts for only 4-6% of nasal cavity polyps, it particularly affects the pediatric population. RESUMEN DEL CASO A 16-year-old male adolescent with a history of coagu- lation disorder under investigation presented to the emer- gency department with persistent right-sided nasal obs- truction, a sensation of a foreign body in the ipsilateral nasal cavity, and snoring for approximately two months. Examina- tion revealed a grade III polyp in the right nasal cavity, mu- cous rhinorrhea on the left, and a 5-centimeter neoforma- tion in the oropharynx arising from the posterior wall with a midline ulceration. A CT scan of the paranasal sinuses showed a large, ho- mogeneous, low-density, expansile mass in the posterior aspect of the right nasal cavity, involving the ipsilateral in- ferior turbinate and maxillary sinus antrum. This mass cau- sed severe obstruction of the nasopharynx and extended inferiorly to the oropharynx without evidence of bony erosive phenomena. The findings were consistent with a giant antrochoanal polyp (34 mm in width and 16 mm in anteroposterior diameter). The patient underwent endoscopic sinus surgery for the excision of the neoformation in the right nasal cavity, inclu- ding a right middle meatal antrostomy and canine fossa ap- proach. Postoperative complications included multiple epi- sodes of epistaxis, one of which had hematologic repercussions and required cauterization. At an-8-week fo- llow-up, there was no recurrence of the polyp. CONCLUSIONES Y COMENTARIOS Early diagnosis, combined with careful clinical evaluation and imaging studies, is essential for the accurate identifica- tion and characterization of these lesions. Treatment is sur- gical, ideally performed via an endoscopic approach, with complete removal, particularly of the origin in the maxillary sinus, to minimize the risk of recurrence. Adequate postope- rative monitoring is equally crucial to ensure long-term suc- cess and prevent complications.