Velopharyngeal stenosis, a late complication of radiotherapy

A designed ladder-shaped stent for the treatment of refractory hypopharyngeal corrosive strictures

BACKGROUND

The treatment of refractory hypopharyngeal corrosive strictures remains challenging nowadays.

OBJECTIVES

To introduce a designed ladder-shaped stent for the treatment of refractory hypopharyngeal corrosive strictures.

MATERIAL AND METHODS

Patients with refractory hypopharyngeal corrosive strictures treated in our hospital between 2018 to 2022 were recruited in this study. All the patients had a dysphasia score of 4 and four patients had a tracheostomy preoperatively. A designed ladder-shaped stent was placed in the hypopharyngeal area after laser treatment to maintain the opening. This stent was kept for 3-6 months. All the patients were followed-up for at least 6 months after stent removal.

RESULTS

Six patients were recruited including two males, three females and one girl. All the patients were tolerable with the stent. There were no immediate or long-term complications. Patients were able to swallow a soft diet after the procedure. No tracheostomy was needed.

CONCLUSION

This use of a ladder-shaped stent is helpful in the treatment of hypopharyngeal strictures after laser treatment.

Acquired nasopharyngeal stenosis after radiation treatment for nasopharyngeal carcinoma

INTRODUCTION

Nasopharyngeal stenosis (NPS) is a rare and morbid complication following radiation therapy for nasopharyngeal carcinoma. This review provides an update on management and prognosis.

METHODS

A comprehensive PubMed review using the terms "nasopharyngeal stenosis," "choanal stenosis," and "acquired choanal stenosis" was performed.

RESULTS

Fourteen studies identified 59 patients who developed NPS after radiotherapy for NPC. 51 patients underwent endoscopic nasopharyngeal stenosis excision by cold technique (80-100% success). The remaining 8 underwent carbon dioxide (CO₂) laser excision with balloon dilation (40-60% success). Adjuvant therapies included postoperative topical nasal steroids in 35 patients. The need for revision was 62% in the balloon dilation group, vs 17% in the excision group (p-value <0.01).

CONCLUSION

When NPS occurs after radiation, primary excision of scarring is the most effective method of management with less need for revision surgery relative to balloon dilation.

Chemotherapy-induced Nasopharyngeal Stenosis Treated with Bilateral Facial Artery Musculomucosal Flaps

We report the first case of a 50-year-old woman who developed nasopharyngeal stenosis (NPS) after chemotherapy for malignant lymphoma. The chemotherapy was effective, but NPS developed following treatment. The tumors of the pharynx and soft palate became necrotic and turned into scar tissue, which caused NPS, especially in the caudal part of the soft palate. The patient developed nasal obstruction and obstructive sleep apnea due to the stenosis. The patient underwent 2 surgeries to resolve the NPS: the first was a simple incision of the stenosis, and the second was Z-plasty and mucous membrane transplantation from the posterior pharyngeal wall. However, the NPS recurred soon after these 2 surgeries. We used bilateral inferior-based facial artery musculomucosal (FAMM) flaps as a solution for recurrent NPS, and it was effective in preventing further stenosis. The blood supply to the flaps was stable, and the size of the flaps was enough to compensate for the area of tissue deficit. The use of bilateral FAMM flaps allowed both sides of the NPS to be corrected, and the flaps provided sufficient retracting strength to keep expanding the nasopharyngeal space by pulling from both sides. After the operation, nasal obstruction was decreased, and the sleep quality of the patient improved significantly. The velopharyngeal function was maintained, and there was no symptom of nasopharyngeal insufficiency. Our results suggest that the bilateral FAMM flap is a suitable method to rescue intractable cases of NPS.

The ancient practice of sutra neti leading to velopharyngeal stenosis: case report

BACKGROUND

An ancient yoga technique called sutra neti, which is extensively used in India to keep the sinuses healthy, led to complete velopharyngeal stenosis in a 67-year-old male patient who presented with bilateral nasal obstruction, mouth breathing, anosmia and a change in voice.

METHOD

The patient was diagnosed by nasal endoscopy using a zero-degree Hopkins rod endoscope, and adhesions were released using coblation.

RESULTS

The patient had post-operative alleviation of symptoms and a patent velopharyngeal inlet on examination.

CONCLUSION

Vigorous sutra neti can lead to velopharyngeal stenosis. Release of the stenosis is then required to cure the nasal blockade.

Velopharyngeal dysfunction from intranasal substance abuse: Case series and review of literature

OBJECTIVE

Intranasal substance abuse with cocaine or opioids can result in complications involving the midline nasal and oral structures. When the defect involves the velopharyngeal musculature, this leads to velopharyngeal dysfunction (VPD). This article aims to illustrate this clinical entity through a series of four patients and a review of the literature.

METHODS

A series of four cases of VPD due to intranasal narcotic use and their management are discussed. A comprehensive search in PubMed was conducted for cases of VPD associated with intranasal drug use in the English-language literature.

RESULTS

Four female patients presented with symptoms of VPD, including worsening nasal regurgitation, poor speech intelligibility, and hypernasal speech. One patient presented with nasopharyngeal stenosis. All patients admitted to intranasal cocaine, methamphetamine, and/or prescription narcotics use prior to the onset of symptoms. The diagnosis was confirmed with abnormal velopharyngeal musculature seen on nasopharyngoscopy. Both conservative and surgical treatment options were proposed. A literature review identified nine cases of VPD. Erosion of the velum was seen in all cases. Reported treatments included obturator prosthetic, local flap, and free flap. Ancillary investigations were not consistently pursued to rule out other etiologies to VPD.

CONCLUSION

Intranasal illicit drug use can result in destructive changes leading to VPD. This is the largest case series to date of this difficult clinical problem. Management principles including options for conservative and surgical interventions are summarized.

LEVEL OF EVIDENCE

4 Laryngoscope, 128:2721-2725, 2018.

Nasopharyngeal Stenosis: A Rare Radiotherapy Complication

Introduction

Acquired nasopharyngeal stenosis after radiotherapy for NPC is rare. We report a case of bilateral choanal stenosis and nasopharygeal stenosis in patient treated with chemo radiotherapy for undifferentieted nasopharnygeal carcinoma.

Case Report

A 68 years old man treated for undifferentiated nasopharyngeal carcinoma with chemo-radiotherapy 10 years before. He complained of complete nasal obstruction, rhinorrhea, anosmia, snoring and hearing loss. Clinical examination and imaging revealed bilateral choanal stenosis and nasopharyngeal stenosis. Patient underwent a transnasal endoscopic resection for scar tissue with stenting of posterior choanae. Restenosis was noted just after stent removal. Second endoscopic resection of stenosis was done, followed by application of mitomycin-C without stenting. Several months later, the patient has good airflow, a patent nasopharynx without reccurence of stenosis.

Discussion

The use of topical mitomycin-C may prove useful in the treatment and prevention of subsequent restenosis and scar formation in larynx and tracheal. Mitomycin-C application has being shown useful in treating nasopharyngeal stenosis. It is safely used topically in various surgical sites without major side effect.

Conclusion

Nasopharyngeal stenosis is an unusual complication of radiotherapy that can be successfully treated with combine two modalities: surgical and mitomycin-C as an adjunct.

Stenting the nasopharyngeal isthmus by nasopharyngeal airway after correction of acquired total nasopharyngeal obstruction: surgical procedure and results

The objective of this study is to describe a simple surgical procedure for management of acquired total nasopharyngeal obstruction in adults. Five patients were diagnosed as having complete nasopharyngeal obstruction over a 3-year period. Three patients previously underwent uvulopalatoplasty, while for the remaining two it was due to pharyngoscleroma. In all the patients, nasopharyngeal obstruction was at the level of the inferior edge of the soft palate. Two of the post-uvulopalatoplasty patients had recurrent obstruction after scar excision and topical application of mitomycin-C without stenting. All the patients were treated surgically by creation of a new anatomical nasopharyngeal isthmus and stenting it by nasopharyngeal airway for 6 months. All the patients experienced satisfactory results and good tolerability to airway placement. The nasopharyngeal airway can counteract the inevitable scar contraction of the new nasopharyngeal isthmus after surgical correction and maintain its patency.

CO₂ laser ablation and balloon dilation for acquired nasopharyngeal stenosis: a novel technique

OBJECTIVES/HYPOTHESIS

Although acquired nasopharyngeal stenosis (NPS) is frequently attributed to infectious and granulomatous processes, it can also occur secondary to external beam radiation therapy for head and neck cancer. NPS can be treated with local flaps, laser excision, nasal stenting, and combinations thereof. Unfortunately, the postoperative course is frequently complicated by scarring and restenosis that often necessitates multiple revision surgeries. The objective of this study is to report a novel endoscopic approach, employing the use of a flexible CO(2) laser in combination with balloon dilation and mitomycin-C application, allowing for the successful treatment of acquired NPS with lasting results.

STUDY DESIGN

Retrospective review of case series.

METHODS

An endoscope with a working channel is passed transnasally to the location of nasopharyngeal stenosis. A flexible CO(2) laser fiber is then inserted via the working channel of the scope. Precise radial incisions are made on the stenosis using the laser under direct visualization. The laser is removed, and a controlled radial expansion balloon dilation device is inserted, advanced to span the segment of stenosis, and inflated to achieve adequate dilation. Mitomycin-C is then applied topically to the area of dilation.

RESULTS

Three patients with severe NPS were treated using this novel technique. All patients had successful long-lasting dilation of NPS without complications over a follow-up period ranging from 12 to 18 months.

CONCLUSIONS

Acquired NPS can be successfully treated with durable results with radial laser incisions and controlled radial expansion balloon dilation.