Sagittal (image 1) and axial (image 2) post-contrast CT imag | Figure 1

CincyKidsRad

Cincinnati Children's Radiology

Sagittal (image 1) and axial (image 2) post-contrast CT images show a hypodense antrochoanal polyp (arrow) arising from the right nasal cavity.

An antrochoanal polyp is an inflammatory nasal polyp. Children with an antrochoanal polyp typically present with nasal obstruction and discharge. However, other symptoms such as nosebleeds, snoring, and obstructive sleep apnea may also be present.

Other pediatric nasal masses include juvenile nasopharyngeal angiofibroma, basal encephalocele, rhabdomyosarcoma, and nasal neuroglial heterotopia.

Read more about these masses and learn of the more detailed differential diagnosis in this RadioGraphics article

Trending cases

Axial T2 (image 1), and axial (image 2) and coronal (image 3) T1 postcontrast MRI and the child with esthesioneuroblastoma show an expansile mass (arrow) occupying and expanding the left ethmoid air cells causing compression of the left orbit leading to proptosis (arrowhead) of the left globe. Esthesioneuroblastoma is a neuroblastic tumor arising from the olfactory epithelium. The tumor most commonly occurs in adults between 40 and 70 years of age. Patients may present with nasal obstruction, epistaxis, nasal discharge, and pain. #NeuroWednesday

59 years old, female. Complaint of chronic nasal obstruction and bleeding in the left nostril. Observe a nasal polyp at the bottom of the nostril. Their most common manifestation is in patients with chronic rhinosinusitis. They are also associated with aspirin exacerbated respiratory disease, systemic vasculitis, cystic fibrosis, among others.

This neonate showed nasal obstruction at birth and was found to have a mass in the right nasal passage. What is your differential diagnosis?

23 years Down's syndrome patient long standing Rt nasal obstruction occasional epistaxis. Specimen shown in the picture. What do you think? #medical-student

Privacy Preference Center

When you visit any website, it may store or retrieve information on your browser, mostly in the form of cookies. This information might be about you, your preferences, or your device, and is mostly used to make the site work as you expect. The information does not usually identify you directly, but it can give you a more personalized web experience. Because we respect your right to privacy, you can choose not to allow some types of cookies. Click on the different category headings to learn more and change our default settings. Blocking some types of cookies may impact your experience of the site and the services we are able to offer.