Choanal Polyps With Osseous Metaplasia From the Nasal Septum: A Case Report and the Literature Review.
Hongjin Li, Jiawei Chen, Yucong Du et al.
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Case in brief
A 63-year-old man presented with persistent right-sided nasal obstruction. Endoscopy showed a smooth, irregular, light-yellow lobulated mass arising from the right nasal septum and extending into the nasopharynx. CT demonstrated a large soft-tissue mass in the nasal meatus with a central ossified structure. Biopsy showed nasopharyngeal mucositis, while histopathological examination of the mass removed by functional endoscopic sinus surgery established the diagnosis of a choanal polyp.
What made this case unusual
The polyp arose from the nasal septum and contained osseous metaplasia, an uncommon combination highlighted by the report.
Diagnostic / clinical pearl
A septal mass extending into the nasopharynx with central ossification may be a choanal polyp; biopsy findings may differ from the diagnosis established on examination of the excised mass.