case_images: PMC7992401_01
case_images: polypoid mass filling the right nasal cavity
case_images: PAMJ-37-373-g001.jpg
case_images: PMC7992401_01_PAMJ-37-373-g001.jpg
case_images: F1
case_images: Physical examination with nasal endoscopy found a large polypoid mass (Figure 1) filling completely the right nasal cavity extending to the nasopharynx leading to a left septal deviation.
case_images: coronal (A, B) and axial (C, D) CT scan showing a large mass of the right nasal cavity with an extension to the choana (A, C) and nasopharynx (B) with a right ethmoidal filling (D)
case_images: PAMJ-37-373-g002.jpg
case_images: PMC7992401_01_PAMJ-37-373-g002.jpg
case_images: F2
case_images: No bony destruction was observed (Figure 2).
case_images: MR images showing an iso-intense T1-weighted sequence right naso-sinusal mass (A, B) with a peripheral enhancing on T1-weighted-gadolinium sequences (C) and "cerebriform" aspect on T2-weighted sequences (D, E)
case_images: PAMJ-37-373-g003.jpg
case_images: PMC7992401_01_PAMJ-37-373-g003.jpg
case_images: F3
case_images: T1-weighted-gadolinium sequences (Figure 3). The diagnosis of inflammatory mass or angiectasic polyp were evoked.
case_images: A) (HEx40) endophytic or "inverted" growth pattern consisting of thickened epithelial nests arising from the surface and growing down into the stroma; B) (HEx100) slightly higher magnification showing the endophytic pattern of growth of benign non-keratinizing squamous epithelium; C) (HEx400) the epithelial proliferation is noteworthy of uniformity of nuclei, absence of cytologic atypia and the presence of neutrophils throughout the epithelium
case_images: PAMJ-37-373-g004.jpg
case_images: PMC7992401_01_PAMJ-37-373-g004.jpg
case_images: F4
case_images: Microscopally, the tumor was made of thickened epithelial nests arising from the surface and growing down into the stroma confiming the enodophytic growth related to the IP (Figure 4).