PMC7992401_01
polypoid mass filling the right nasal cavity
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F1
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.
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)
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F2
No bony destruction was observed (Figure 2).
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)
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F3
T1-weighted-gadolinium sequences (Figure 3). The diagnosis of inflammatory mass or angiectasic polyp were evoked.
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
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F4
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).