Choanal polyp arising from the posterior end of the nasal septum

A Large Asymptomatic Polyp Originating From the Nasal Septum: A Case Report

A neoplasm was found in the left nasal cavity of a 45-year-old woman during electronic laryngoscopy for reflux pharyngitis. She reported experiencing an occasional slight headache in the left parietal region for 1 to 2 years, which she considered a migraine. Electronic laryngoscopy showed a gray, soft, smooth neoplasm in the left nasal meatus, located near the olfactory region blocking the olfactory clef and compressing the left middle turbinate. The neoplasm was resected at endonasal endoscopic surgery. Histological assessments indicated chronic mucus inflammation and cyst formation. This is a rare case because the polyp was large but asymptomatic and originated from nasal septum.

Septochoanal Polyp on the Concave Side of the Deviated Nasal Septum

The septochoanal polyp is one of the choanal polyps derived from the nasal septum. They rarely occur, with only a few cases reported in the English literature. The etiology is still uncertain though it is thought to be associated with inflammation. Pathological findings generally show chronic inflammatory polyps and should be differentiated from other tumors. We report a case of a 32-year-old man diagnosed with a septochoanal polyp on the concave side of the deviated nasal septum. Previous reports have not mentioned the relationship between septochoanal polyp and the direction of septal deviation. This case is a practical example when considering the potential causes of the septochoanal polyp.

Septochoanal polyp with osseous metaplasia: a case report

Background

Polyps originating from the posterior septum with choanal extension, also known as “septochoanal polyps,” are uncommon, and septochoanal polyps with central calcification are extremely rare. We report the second case of septochoanal polyps with central calcification in the English literature.

Case presentation

A 55-year-old Thai woman presented with a progressive left-side nasal obstruction. An examination of her nose revealed an irregular lobulated mass, yellow in color, with a smooth surface that arose from her posterior nasal septum and extended down to her nasopharynx. Computed tomography revealed a large choanal mass with a central ossified structure. A punch biopsy was performed and microscopic examination showed an inflammatory polyp. The mass was removed using an endoscopic surgery technique, and the histology of this lesion confirmed a typical presentation of choanal polyps.

Conclusions

Although septochoanal polyps with osseous metaplasia are known to be very rare, physicians should be aware of them and include them in the differential diagnosis of choanal mass with central calcification lesions.

Choanal polyps: an evaluation of 53 cases

BACKGROUND

The aim of this study was to evaluate our experience on the diagnosis and treatment of choanal polyps (CP).

METHODS

This study consists of 53 patients with CP diagnosed by means of rhinoscopy, nasal endoscopy, computerized tomography, surgical, and histologic findings between 1996 and 2005.

RESULTS

The origins of the CPs were the unilateral maxillary sinus in 47 patients, simultaneously bilateral maxillary sinus in 2 patients, septum in 2 patients, sphenoid sinus in I patient, anterior ethmoid sinus in 1 patient. The most common presenting symptoms were unilateral nasal obstruction, snoring, and rhinorrhea. In the cases of the antrochoanal polyps, the most common preoperative radiological finding was the total opacification of the maxillary sinus.

CONCLUSION

Endoscopic approach for complete removal of the CPs is an extremely safe and effective procedure. It should be focused on the detection of the exact origin and the extent of the polyp to prevent recurrence.

Choanal polyp originating from the middle turbinate

Choanal polyps usually originate from the maxillary sinus. Unusual origins such as the sphenoid sinus, ethmoid sinus, nasal septum and hard and soft palate have been reported in the literature. Herein, we report a rare case of choanal polyp originating from the middle turbinate that was removed by an endoscopic surgery technique. The computed tomographic findings are described and the literature is reviewed.

Choanal polyp originating from the nasal septum: a case report

Almost all nasal polyps originate from the mucosa of the lateral walls of the nasal cavity or from the paranasal sinuses. A choanal polyp is the intranasal portion of a cyst that has arisen from the wall of the maxillary sinus near the ostium. Medially based polyps, such as those that arise from the nasal septum, are rare. The literature cites a wide range of incidence rates for polyps originating from this structure, but choanal extension of this type of polyp is extremely unusual. This report describes a polyp that arose from the superior aspect of the posterior nasal septum and extended through the choana into the nasopharynx. The histology of this choanal lesion was typical of nasal polyps, but the site of origin is rare. The ethiopathogenesis of nasal polyps with its common location remains controversial so it is difficult to speculate what mechanism triggered the development of this lesion on the nasal septum. Some form of local inflammation may have induced choanal polyp formation at this atypical site.