Utility of the transnasal esophagoscope in the management of chemoradiation-induced esophageal stenosis

Endoscopic Management of Postradiation Dysphagia in Head and Neck Cancer Patients: A Systematic Review

OBJECTIVES

To systematically review the success rate and safety profile of the available endoscopic surgical options for radiation-induced dysphagia in head and neck cancer patients following organ preservation treatment, including upper esophageal sphincter (UES) dilation, cricopharyngeus (CP) myotomy (CPM), and CP intramuscular botulinum toxin (Botox) injection.

METHODS

A search of MEDLINE, Scopus, Google Scholar, and Cochrane databases was done to identify articles published between January 1980 and December 2017. Pediatric series, foreign language articles, series with Zenker's diverticulum or following primary surgical treatment including laryngectomy, open UES/CP surgery, or samples with fewer than 5 patients were excluded.

RESULTS

An initial search identified 539 articles. All titles and abstracts were reviewed. One hundred and sixteen potentially relevant articles were inspected in more detail, and 14 retrospective studies met eligibility criteria. Dilation group included 10 studies on anterograde and/or retrograde dilation, with an overall 208 patients. Success rate ranged from 42% to 100%. The endoscopic CPM group included 3 studies with a total of 36 patients, and the success rate ranged from 27% to 90%. In the Botox group, 1 one study with 20 patients met our inclusion criteria, with an overall 65% success rate (13/20). Major complications were only reported in the dilation group, which included esophageal perforation and death.

CONCLUSIONS

The lack of consistency across trials indicates insufficient evidence for guiding clinical practice. This systematic review suggests the need for greater standardization of outcomes and instruments. Future prospective evaluation should use validated patient-rated and clinician-rated assessment tools to optimally measure postoperative swallowing outcomes of head and neck cancer dysphagic patients following organ preservation therapy.

Endoscopic Dilation of Pharyngoesophageal Strictures: There Are More Dimensions than a Diameter

Background/Aims

Dysphagia due to benign pharyngoesophageal strictures (PES) often requires repeated dilations; however, a uniform definition for the therapeutic efficacy of this technique has not been yet established. We aimed to assess the overall efficacy of endoscopic dilation of pharyngoesophageal anastomotic or post-radiotherapy (post-RT) strictures.

Methods

The data of 48 patients with post-RT (n = 29) or anastomotic PES (n = 19) submitted to endoscopic dilation during a 3-year period were retrospectively assessed. The Kochman criteria were used to determine refractoriness and recurrence. Patients were asked to answer a questionnaire determining prospectively the dilation program efficacy as (a) dysphagia improvement, (b) dysphagia resolution, (c) need for further dilations, or (d) percutaneous endoscopic gastrostomy (PEG) during the previous 6 months. Need for additional therapy was considered an inefficacy criterion.

Results

The median number of dilations per patient was 4 (total of 296 dilations) with a median follow-up of 29 months. The mean predilation dysphagia Mellow-Pinkas score was 3 and the initial stenosis diameter was 7 mm. Fifteen and 29% of patients presented with the Kochman criteria for refractory and recurrent strictures, respectively. Moreover, 96 and 60% showed dysphagia improvement and resolution, respectively. Seventy-five-percent did not require dilations during 6 months, and 89% did not require PEG. From the patients' perspective, overall efficacy was achieved in 58% of cases. Nine additional therapies were required. Number of dilations (OR 0.7), stricture diameter (OR 2.2), and nonrecurrence criteria (OR 14.2) appeared as significant predictors of overall efficacy, whereas refractory stenosis criteria did not.

Conclusions

Endoscopic dilation seems to be effective for patients with dysphagia after RT or surgery, especially when assessed as patient perception of improvement. Narrow strictures, recurrent ones, and strictures requiring a higher number of dilations may predict worse outcomes.

Key Message

Health professionals should establish well-defined efficacy criteria for dilations and base their decision beyond exclusively objective measurements.

Swallowing assessment and management pre and post head and neck cancer treatment

PURPOSE OF REVIEW

Head and neck cancer (HNC) imposes significant structural, functional, and cosmetic burdens upon those affected. Although advances in multimodality organ preservation therapy have assisted in ameliorating a number of previous treatment-related sequelae, dysphagia remains a foremost concern for members of the multidisciplinary team. Given its acute and long-term impact on physical and psychological wellbeing, and subsequent bearing on delivery of treatment, treatment-related morbidity and overall mortality, prompt recognition, and accurate assessment and optimization of management are pivotal.

RECENT FINDINGS

Qualitative research has provided greater insight into the psychosocial burdens dysphagia imposes on HNC patients and carers, highlighting the need for holistic strategies of management. There is a growing body of evidence to support dietary alterations and preventive swallowing exercise regimens for maintenance of oral intake throughout and following HNC therapy. The role of prophylactic enteral feeding, however, remains uncertain, with conflicting institutional data and lack of high-quality prospective studies for meaningful systematic literature assessment. Endoscopic surgical techniques hold promise in relieving stricture-related dysphagia; however, multiple treatments are required and recurrence is common.

SUMMARY

Swallowing rehabilitation encompassing education, dietary modification, and swallowing exercises comprise the mainstay of current evidence-based dysphagia management in HNC patients.