Patient With Dysphonia.

A male individual in his 60s presented with a hoarse and weak voice and a history of follicular lymphoma with multiple relapses treated with an allogeneic stem cell transplant complicated by graft-vs-host disease treated with sirolimus and steroids. What is your diagnosis?

Tracheal stenosis and airway complications in the Coronavirus Disease-19 era.

BACKGROUND: Severe Coronavirus Disease 2019 (COVID-19) infection is associated with prolonged intubation and its complications. Tracheal stenosis is one such complication that may require specialized surgical management. We aimed to describe the surgical management of post-COVID-19 tracheal stenosis. METHODS: This case series describes consecutive patients with tracheal stenosis from intubation for severe COVID-19 infection at our single, tertiary academic medical center between January 1st, 2021, and December 31st, 2021. Patients were included if they underwent surgical management with tracheal resection and reconstruction, or bronchoscopic intervention. Operative through six-month, symptom-free survival and histopathological analysis of resected trachea were reviewed. RESULTS: Eight patients are included in this case series. All patients are female, and most (87.5%) are obese. Five patients (62.5%) underwent tracheal resection and reconstruction (TRR), while three patients (38.5%) underwent non-resection-based management. Among patients who underwent TRR, six-month symptom free survival is 80%; one patient (20%) required tracheostomy after TRR due to recurrent symptoms. Two of the three (66.7%) of patients who underwent non-resection-based management experienced durable relief from symptoms of tracheal stenosis with tracheal balloon dilation, and the remaining patient required laser excision of tracheal tissue prior to experiencing symptomatic relief. CONCLUSIONS: The incidence of tracheal stenosis may increase as patients recover from severe COVID-19 infection requiring intubation. Management of tracheal stenosis with TRR is safe and effective, with comparable rates of success to TRR for non-COVID-19 tracheal stenosis. Non-resection-based management is an option to manage tracheal stenosis in patients with less severe stenosis or in poor surgical candidates.

Adoption and Utilization of Heat and Moisture Exchangers (HMEs) in the Tracheostomy Patient.

OBJECTIVE: Management of tracheostomized patients typically involves a conventional external humidification system (CEHS). CEHS are noisy, negatively impact patient mobility, and increases costs. Additionally, they prevent phonation and the ability to cough. Alternatively, heat and moisture exchange (HME) devices have been used in laryngectomized patients. We present an institutional quality improvement project exploring the use and efficacy of an HME device following tracheostomy. METHODS: Health care professionals and stakeholders from multiple disciplines were identified: otolaryngology, nursing, administration, case management, and speech-language pathology. The focus was on an otolaryngology acute care nursing unit. Protocols for product acquisition, nursing education, care flowcharts, and discharge planning were established. Efficacy was assessed by tracking patient pulmonary status, nursing notes, and questionnaires. RESULTS: Seventy-one tracheostomized patients were enrolled. Two patients (2.8%) were unable to tolerate the HME. There were no complications from mucous plugging or respiratory distress. Eighty-nine percent of nursing staff surveyed preferred the use of an HME device over CEHS, particularly for ease of patient mobility. Additional favorable findings were patient satisfaction, cost savings, reduced noise, communication, and ease of discharge education and planning. DISCUSSION: Replacing CEHS with HMEs provides distinct advantages, with a positive impact on patients, family members, and health care personnel. Resistance to changing from the traditional standard of care was alleviated with education, focused training, and positive outcomes. IMPLICATIONS FOR PRACTICE: These data indicate that an HME device is safe and offers advantages to both patients and nurses over traditional CEHS.

The Clinical Impact of Vascular Endothelial Growth Factor/Receptor (VEGF/R) Inhibitors on Voice.

Background: Vascular endothelial growth factor/receptor (VEGF/R) inhibitors are used in chemotherapy protocols to limit tumor angiogenesis. Recent evidence shows they are associated with hoarseness, but their impact on vocal cord function has not been fully identified. Objectives: To describe the preliminary laryngeal findings in patients undergoing chemotherapy with VEGF/R inhibitors, and to describe possible mechanisms of their effect on vocal fold function. Methods: A retrospective case series was conducted in a tertiary medical center between July 2008 and August 2022. Cancer patients developing hoarseness while undergoing chemotherapy with VEGF/R inhibitors underwent videolaryngostroboscopy. Results: The study included four patients. There were three females and one male, treated for breast, lung, and unknown primary cancer, respectively. All 4 patients developed hoarseness 2-7 days after initiating treatment with the VEGF/R inhibitor drugs aflibercept (n = 1) and bevacizumab (n = 3). In all patients, videolaryngostroboscopy revealed vocal fold bowing and pronounced glottic insufficiency. There were no signs of mucositis or paralysis. In three patients, treatment involved speech therapy, with or without vocal fold augmentation. The average follow-up was 10 months (range 8-12 months). In 2 patients, there was a return of normal voice quality with resolution of vocal fold bowing. In one patient, who remained on chemotherapy, there was persistent bowing. Conclusions: VEGF/R inhibitors are associated with vocal fold bowing and glottic insufficiency. This appears to be a reversible side effect. To our knowledge, this is only the second clinical description of the effect of VEGF/R inhibitors on vocal fold function.

Safety and Utility of Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRIVE) for Laser Laryngeal Surgery.

OBJECTIVE: Transnasal humidified rapid-insufflation ventilatory exchange (THRIVE) is gaining acceptance as a safe method for apneic ventilation and oxygenation during laryngeal procedures, but remains controversial during laser laryngeal surgery (LLS) due to the theoretical risk of airway fire. This study describes our experience with THRIVE during LLS. STUDY DESIGN: Retrospective cohort study. SETTING: Stanford University Hospital, October 15, 2015 to June 1, 2021. METHODS: Retrospective chart review of patients ≥18 years who underwent LLS involving the CO2 or KTP laser with THRIVE as the primary mode of oxygenation. RESULTS: A total of 172 cases were identified. 20.9% were obese (BMI ≥ 30). Most common operative indication was subglottic stenosis. The CO2 laser was used in 79.1% of cases. Median lowest intraoperative SpO2 was 96%. 44.7% cases were solely under THRIVE while 16.3% required a single intubation and 19.2% required multiple intubations. Mean apnea time for THRIVE only cases was 32.1 minutes and in cases requiring at least one intubation 24.0 minutes (p < .001). Mean apnea time was significantly lower for patients who were obese (p < .001) or had a diagnosis of hypertension (p = .016). Obese patients and patients with hypertension were 2.03 and 1.43 times more likely to require intraoperative intubation, respectively. There were no intraoperative complications or fires since the institution of our LLS safety protocol. CONCLUSION: By eliminating the fuel component of the fire triangle, THRIVE can be safely used for continuous delivery of high FiO2 during LLS, provided adherence to institutional THRIVE-LLS protocols.

Pill Ingestion and Caustic Laryngeal Injury.

OBJECTIVE: To highlight an unusual mechanism of laryngeal injury. METHODS: Case report and literature review. RESULTS: A 66-year-old male ingested an over-the-counter preparation of bile acids as a dietary supplement. The capsule lodged in the patient's pharynx, and he sustained a caustic injury to the supraglottic and glottic larynx. His injury was managed conservatively, and his symptoms gradually resolved over a period of 8 weeks. A follow-up laryngoscopy at 8 weeks and 6 months showed no signs of injury. A barium swallow at 8 weeks was normal at that time and videostroboscopy results normalized with resolution of the injury as well. CONCLUSIONS: Caustic injury to the upper aerodigestive tract from pill ingestion is uncommon, and laryngeal injury even less so. Urgent evaluation should be undertaken, and appropriate therapies instituted promptly. Laryngeal injury can respond to conservative therapy, but there is a lack of clinical information to evaluate optimum treatment of this unusual injury.

Has Esophageal Speech Returned as an Increasingly Viable Postlaryngectomy Voice and Speech Rehabilitation Option?

PURPOSE: The literature on postlaryngectomy voice and speech rehabilitation is long-standing. Although multiple rehabilitation options have existed over the years, the acquisition and use of esophageal speech (ES) has decreased significantly over the past 40 years. This reduction coincides with the increased application of tracheoesophageal puncture (TEP) voice restoration. The literature suggests that voice acquisition failures observed secondary to TEP may represent a similar phenomenon that led to ES acquisition failures. METHOD: A comprehensive review of the literature on ES and TEP voice/speech was conducted. Specific attention was directed toward information on ES and TEP speech failures. Information on pharyngoesophageal segment (PES) spasm in the context of ES and TEP voicing failures was of specific importance. RESULTS: Similarities between voicing failures with both ES and TEP were identified. In order to resolve spasm in TEP speech, proactive efforts to eliminate it were undertaken, and regardless of the method used, voicing improvements were observed. These data suggest that both ES and TEP speech acquisition failures may be related to the same control mechanisms influencing the PES. CONCLUSIONS: The elimination of PES spasm provides evidence that justifies the reconsideration of ES. Consequently, ES may return as an increasingly viable postlaryngectomy voice and speech rehabilitation option.

Expert Consensus Statement on the Perioperative Management of Adult Patients Undergoing Head and Neck Surgery and Free Tissue Reconstruction From the Society for Head and Neck Anesthesia.

The perioperative care of adult patients undergoing free tissue transfer during head and neck surgical (microvascular) reconstruction is inconsistent across practitioners and institutions. The executive board of the Society for Head and Neck Anesthesia (SHANA) nominated specialized anesthesiologists and head and neck surgeons to an expert group, to develop expert consensus statements. The group conducted an extensive review of the literature to identify evidence and gaps and to prioritize quality improvement opportunities. This report of expert consensus statements aims to improve and standardize perioperative care in this setting. The Modified Delphi method was used to evaluate the degree of agreement with draft consensus statements. Additional discussion and collaboration was performed via video conference and electronic communication to refine expert opinions and to achieve consensus on key statements. Thirty-one statements were initially formulated, 14 statements met criteria for consensus, 9 were near consensus, and 8 did not reach criteria for consensus. The expert statements reaching consensus described considerations for preoperative assessment and optimization, airway management, perioperative monitoring, fluid management, blood management, tracheal extubation, and postoperative care. This group also examined the role for vasopressors, communication, and other quality improvement efforts. This report provides the priorities and perspectives of a group of clinical experts to help guide perioperative care and provides actionable guidance for and opportunities for improvement in the care of patients undergoing free tissue transfer for head and neck reconstruction. The lack of consensus for some areas likely reflects differing clinical experiences and a limited available evidence base.

Managing head and neck cancer patients with tracheostomy or laryngectomy during the COVID-19 pandemic.

Head and neck cancer patients with tracheostomies and laryngectomies, as well as their healthcare providers, face unique challenges in the context of the current COVID-19 pandemic. This document consolidates best available evidence to date and presents recommendations to minimize the risks of aerosolization and SARS-CoV-2 exposures in both the inpatient and outpatient settings. The cornerstones of these recommendations include the use of closed-circuit ventilation whenever possible, cuffed tracheostomy tubes, judicious use of heat moisture exchange units, appropriate personal protective equipment for providers and patients, meticulous hand hygiene, and minimal manipulation of tracheostomy tubes.

The Safety and Efficacy of Transnasal Humidified Rapid-Insufflation Ventilatory Exchange for Laryngologic Surgery.

OBJECTIVES: Transnasal humidified rapid-insufflation ventilatory exchange (THRIVE) is an intraoperative ventilatory technique that allows avoidance of tracheal intubation (TI) or jet ventilation (JV) in selected laryngologic surgical cases. Unimpeded access to all parts of the glottis may improve surgical precision, decrease operative time, and potentially improve patient outcomes. The objective of this prospective, randomized, patient-blinded, 2-arm parallel pilot trial was to investigate the safety and efficacy of THRIVE use for adult patients undergoing nonlaser laryngologic surgery of short-to-intermediate duration. METHODS: Twenty adult, American society of anesthesiology class 1-3 patients with body mass index (BMI) < 35 kg/m2 were randomly assigned to either an experimental THRIVE group or active comparator conventional ventilation group (TI or supraglottic high-frequency JV [SHFJV]). Primary outcomes included intraoperative oxygenation, anesthesia awakening/extubation time, time to laryngoscopic suspension, number of intraoperative suspension adjustments, and operative time. Secondary patient outcomes including postanesthesia and functional patient recovery were investigated. RESULTS: Compared to TI/SHFJV, THRIVE use was associated with significantly lower intraoperative oxygenation (SpO2 93.0 ± 5.6% vs. 98.7 ± 1.6%), shorter time to suspension (1.8 ± 1.1 minutes vs. 4.3 ± 2.1 minutes), fewer suspension adjustments (0.4 ± 0.5 vs. 1.7 ± 0.9), and lower postoperative pain scores on recovery room admission (1.3 ± 1.9 vs. 3.7 ± 2.9) and discharge (0.9 ± 1.3 vs. 2.7 ± 1.8). The study was underpowered to detect other possible outcome differences. CONCLUSION: We confirm the safe intraoperative oxygenation profile of THRIVE for selected patients undergoing nonlaser laryngologic surgery of short-to-intermediate duration. THRIVE facilitated surgical exposure and improved early patient recovery, suggesting a potential economic benefit for outpatient laryngologic procedures. The results of this exploratory study provide a framework for designing future adequately powered THRIVE trials. TRIAL REGISTER: ClinicalTrials.gov (NCT03091179). LEVEL OF EVIDENCE: II Laryngoscope, 2020.

Early Injection Laryngoplasty After Surgery: 30 Cases and Proposed Aspiration Assessment Protocol.

Vocal fold movement impairment may significantly compromise postoperative recovery and quality of life of patients following thoracic or cardiothoracic surgery or prolonged intubation. The literature is limited and there is no standard screening protocol for the optimal postoperative swallowing and aspiration evaluations. We performed retrospective review of adult patients undergoing early vocal fold (VF) injection laryngoplasty for acute postoperative Vocal fold movement impairment (<30 days) that had both pre- and postinjection speech language pathologist (SLP) performed swallowing/aspiration evaluations. Records were reviewed for demographics, clinical characteristics, procedural details, and short-term outcome measures of oral intake. In total, 30 patients were included, and had data on swallowing/aspiration studies before and after the VF injection laryngoplasty. Most of the patients were injected within 5 days following the laryngologist evaluation and within 14 days following the iatrogenic recurrent laryngeal nerve injury (23/30, 76.7%). The majority of patients were injected at the bedside by awake transcutaneous injection (22/30, 73.3%), six patients were injected in the operating room under general anesthesia, and two at the outpatient clinic. Pre- and postinjection SLP evaluations included clinical bedside assessment or instrumental evaluation. Following VF injection laryngoplasty, oral diet advancement was noted in 81.8% of the patients that were nil per os before the injection (18/22). No complications were noted. In conclusions, acute VFMI following surgery requires immediate diagnosis and therapeutic strategy to minimize postoperative complications and to overcome impairments in the voice, swallow, and cough. Otolaryngology-SLP interdisciplinary aspiration and swallowing assessment protocol is proposed based on our experience and an extensive literature review.

The Clinical Course of Idiopathic Bilateral Vocal Fold Motion Impairment in Adults: Case Series and Review of the Literature.

AIM: Steps for assessment and successful management of bilateral vocal fold motion impairment (VFMI) are (1) recognition of its presence, (2) identifying the etiology and factors restricting vocal fold motion, (3) evaluation of airway patency, and (4) establishing a management plan. No large series documenting the course and outcome of adult idiopathic bilateral VFMI has been published within the past 15 years. METHODS: Retrospective chart review of adult patients with idiopathic bilateral VFMI at a tertiary academic center. A diagnosis was established if history, physical examination with laryngoscopy, and initial imaging excluded a cause. Records were reviewed for demographics, clinical characteristics, surgical intervention details, and length of follow-up. RESULTS: Nine adult patients with idiopathic bilateral VFMI were identified. There were five males and four females with a mean age of 59.6 years. The mean follow-up period was 54.4 months (range, 6-111 months). Upon presentation to our laryngology service, three patients were advised observation, three patients were advised to undergo urgent tracheostomy, and three patients were advised to undergo elective surgery for airway management. By the end of the follow-up period, only four patients (4/9, 44.4%) were tracheostomy dependent, one of them was lost to follow-up after tracheostomy tub downsizing for decannulation. CONCLUSIONS: To our best knowledge, this is the largest series so far of adult patients with idiopathic bilateral VFMI. Conservative treatment can be considered as an alternative to surgery in select cases.

Outcomes of Overlapping Surgery in Otolaryngology.

OBJECTIVE: To compare outcomes in otolaryngology between overlapping and nonoverlapping surgeries. STUDY DESIGN: Retrospective cohort study. SETTING: Tertiary referral center. SUBJECTS AND METHODS: All patients undergoing otolaryngologic procedures at Stanford University Hospital between January 2009 and June 2016 were included (n = 13,479). Cases were divided into 2 cohorts: overlapping (n = 1806, 13.4%) vs nonoverlapping (n = 11,673, 86.6%). Variables reviewed were type of operation performed, multidisciplinary team involvement, complications, reoperations, readmissions, and deaths. RESULTS: The total complication rate over 7.5 years studied was 3.3% (n = 450). Complication rates were lower for overlapping cases (0.77%) compared to nonoverlapping cases (3.73%) with an odds ratio of 0.2014, which was statistically significant (P < .0001). When examined by subspecialty, the complication rate for rhinology and endoscopic skull base procedures was approximately 10 times lower when overlapping (0.30%) was compared to nonoverlapping (3.15%), with an odds ratio of 0.094 (P = .0001). There was no difference in complication rates for other surgical subspecialties. There were no deaths associated with overlapping surgery. The rate of major complications requiring reoperation was similarly lower for overlapping procedures (0.276%) compared to nonoverlapping procedures (1.35%) with an odds ratio of 0.2023 (P = .0004). Readmission rates were lower for overlapping cases (0.49%) when compared to nonoverlapping cases (1.09%), with an odds ratio of 0.4553 (P = .0229). CONCLUSIONS: Patients undergoing overlapping surgery had lower overall complication rates, lower reoperation rates, lower readmission rates, and no mortalities. The institutional experience presented provides evidence that with appropriate patient and case selection, otolaryngologists may safely perform overlapping surgery without increased risk of adverse patient outcomes.

Autologous fibroblasts for vocal scars and age-related atrophy: A randomized clinical trial.

OBJECTIVES/HYPOTHESIS: To assess the safety and efficacy of autologous cultured fibroblasts (ACFs) to treat dysphonia related to vocal fold scar and age-related vocal atrophy (ARVA). STUDY DESIGN: Randomized, double-blinded, placebo-controlled, multi-institutional, phase II trial. METHODS: ACFs were expanded from punch biopsies of the postauricular skin in each subject; randomization was 2:1 (treatment vs. placebo). Three injections of 1-2 × 107 cells or placebo saline was performed at 4-week intervals for each vocal fold. Follow-up was performed at 4, 8, and 12 months. The primary outcome was improved mucosal waves. Secondary outcomes included Voice Handicap Index (VHI)-30, patient reported voice quality outcomes, and perceptual analysis of voice. RESULTS: Fifteen subjects received ACF and six received saline injections. At 4, 8, and 12 months after ACF treatments, a significant improvement in mucosal wave grade relative to baseline was observed in both vocal scar and ARVA groups. Relative to control group, mucosal waves were significantly improved in the ARVA group at 4 and 8 months. Perceptual analysis significantly improved in the vocal scar group 12 months after ACF treatments compared to controls. Vocal scar group reported significantly improved vocal quality from baseline. VHI and expert rater voice grade improved in both groups, but did not achieve significance. No adverse events related to fibroblast injections were observed. CONCLUSIONS: In this cohort, injection of ACFs into the vocal fold lamina propria (LP) was safe and significantly improved mucosal waves in patients with vocal scar and ARVA. ACF may hold promise to reconstruct the LP. LEVEL OF EVIDENCE: 1 Laryngoscope, 130:2650-2658, 2020.

Increased Expression of Estrogen Receptor Beta in Idiopathic Progressive Subglottic Stenosis.

BACKGROUND/OBJECTIVES: Idiopathic progressive subglottic stenosis (IPSS) predominantly affects females in perimenopause. It has, therefore, been hypothesized that estrogen is involved in its pathogenesis. There are two main types of estrogen receptors: ER-α and ER-ß. Abnormal variants of ER-ß have previously been shown to be associated with poor wound healing. Estrogen receptors have recently been identified in subglottic tissue samples, with elevated levels of ER-α and progesterone receptors, and no expression of ER-ß, in stenotic specimens reported in one study. The objective of this study was to confirm the presence of estrogen receptors in the subglottis and investigate levels of expression and types of estrogen receptors in normal and stenotic subglottic tissue. METHODS: Subglottic tissue was obtained from three female and one male cadaver without laryngotracheal pathology to serve as controls. Subglottic tissue specimens from five female patients with IPSS were also analysed. Immunofluorescence stains for ER-α and ER-ß were performed on specimens. Staining patterns were compared qualitatively and semi-qualitatively between control and IPSS specimens. RESULTS: Immunofluorescence stains demonstrated the presence of both ER-α and ER-ß in subglottic tissue. IPSS specimens demonstrated significantly greater staining intensity of ER-α in the epithelium and ER-ß in glands and ducts compared to controls. CONCLUSIONS: This study confirms the presence of estrogen receptors in the subglottis. Increased expression of ER-α in the epithelium and ER-ß in glands and ducts in IPSS compared to controls may help to explain the predisposition to stenosis in these individuals. LEVEL OF EVIDENCE: 3b Laryngoscope, 130:2186-2191, 2020.

Hematologic malignancies of the larynx: A single institution review.

BACKGROUND: Primary hematologic malignancies of the larynx are rare diagnoses, accounting for less than 1% of all laryngeal tumors. They most commonly present as submucosal masses of the supraglottis, with symptoms including hoarseness, dysphagia, dyspnea and rarely cervical lymphadenopathy. PURPOSE: METHODS: Retrospective case series of patients in a tertiary academic laryngeal practice with hematologic malignancy of the larynx presenting over a 10 year period; charts were reviewed for diagnosis, symptoms, treatment, and outcomes. RESULTS: 12 patients were found to have primary presentation of a hematologic malignancy within the larynx between 2009 and 2019. A submucosal mass was the most common finding, and hoarseness was the most common symptom. Local control of disease was high. Airway obstruction was managed with tracheostomy. Several patients required tube feeding prior to disease control. Most patients underwent radiation therapy and chemotherapy, although surgery alone was effective in patients with isolated disease. CONCLUSIONS: Hematologic malignancies of the larynx are rare but treatable. Biopsy is the mainstay of diagnosis, and imaging may be helpful to exclude diseases with a similar physical presentation (i.e., laryngocele). Prognosis depends on diagnosis but is generally favorable.

Outcomes in modified transoral resection of diverticula for Zenker's diverticulum.

PURPOSE: Transoral resection of Zenker's diverticulum (TORD) was first reported in 2010. We present results for our modified approach to transoral resection (MTORD)-full-thickness cricopharyngeal myectomy, diverticulum sac excision, and suture closure of the pharyngotomy-and evaluate its safety and efficacy compared to endoscopic stapling and open approaches. METHODS: A retrospective study was performed in patients who underwent transoral resection of Zenker's diverticulum using MTORD, endoscopic stapler-assisted diverticulotomy (ESD), or trancervical diverticulectomy (TCD) from July 2009 to August 2017. Pre-operative evaluation included barium swallow and subjective characterization of swallowing dysfunction using the EAT-10 and Reflux Symptom Index (RSI). Complications, length of hospitalization, recurrence, and revision rates were also evaluated. RESULTS: Of 92 patients reviewed, 18 underwent MTORD, 45 underwent ESD and 29 underwent TCD. Major complications were only observed in ESD and TCD. Recurrence which required revision surgery was only observed in ESD. EAT-10 and RSI scores significantly improved and RSI scores normalized post-operatively for all approaches in short-term (< 1 year) follow-up. CONCLUSIONS: MTORD is a safe and effective option for complete Zenker's diverticulectomy. Complication rates are low. To date, no patient has required reoperation, although more cases and longer term follow-up are needed for more complete comparison to ESD and traditional open excision.

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.