Abstract
Certain nasal neoplasms, such as ectopic menigioma, present as nasal polyps, together with similar symptoms. The present study reports the diagnosis and treatment of ectopic meningioma in the bilateral nasal olfactory cleft in order to improve the diagnosis and treatment of ectopic meningioma in the nasal cavity. By retrospectively analyzing the clinical data and reviewing the associated literature, a detailed introduction to the clinical manifestation, diagnosis and treatment of ectopic meningioma of the nasal cavity was ascertained. The tumor was removed from the sinus by functional endoscopy surgery. Regular follow-up appointments were scheduled every three months, with no evidence of recurrence to date. The olfactory recovery and nasal ventilation were normal subsequent to surgery. Meningiomas are infrequently occurring tumors with unpredictable clinical behavior. A clear understanding of the etiology and appropriate diagnostic and management principles may aid in overcoming the challenges of treating primary extracranial meningiomas.
Highlights
Primary and secondary ectopic meningiomas are rare lesions (1)
Primary ectopic meningiomas that develop in the nasal sinus or nasal cavity possess an unknown etiology (2)
Primary extracranial meningiomas are likely to arise from the transformation of embryonic arachnoid cell remnants of ectopic meningocytes, which are derived from pluripotent mesenchymal cells
Summary
Primary and secondary ectopic meningiomas are rare lesions (1). In addition, primary ectopic meningiomas that develop in the nasal sinus or nasal cavity possess an unknown etiology (2). Endoscopy identified the presence of a neoplasm in the bilateral olfactory cleft, with the nasal polyp morphology necessitating a radiological examination. A magnetic resonance imaging (MRI) examination in the Radiology Department of Shanghai Pudong New Area Gongli Hospital revealed sphenoid sinusitis on the left side of the olfactory cleft and a high‐density shadow in the bilateral olfactory cleft five months prior to presenting at the Otolaryngology Department, where a CT scan of the paranasal sinus was conducted. Radiological examination of the nasal cavity prior to surgery identified the presence of soft tissue shadows in the bilateral olfactory cleft area and sinusitis in the left side of the sphenoid. The histopathological appearance of the lesion was meningothelial, a common tumor type in which the cells present in a lobulated arrangement and are spaced along collagen fibers. The patient's olfactory recovery and nasal ventilation were normal subsequent to surgery
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