Occupational exposure of oropharyngeal human papillomavirus amongst otolaryngologists.

OBJECTIVES/HYPOTHESIS: Human papillomavirus (HPV) is a DNA virus that causes cancer in multiple sites. Although sexual activity is the primary means of oropharyngeal HPV acquisition, studies suggest HPV transmission through occupational exposure from medical instruments and surgical fumes. We assess if aerosolization of HPV16 DNA via electrocautery places otolaryngologists at risk for exposure. STUDY DESIGN: Animal and human laboratory model. METHODS: Plasmid (pLXSN16E6E7) expressing HPV p16 E6/E7 genes was transformed into DH5α Escherichia coli cells using the heat shock method. Miniprep and maxiprep purification of transformed DNA with subsequent restriction enzyme double digestion confirmed presence of E6E7 fragment. We injected 2 µg plasmid DNA in 20 µL TE (Tris and ethylenediaminetetraacetic acid) buffer intradermally into freshly severed mouse tail then cauterized for 5 to 10 seconds. Generated fumes were collected through a suction tube fitted with Whatman filter paper. Filter paper was placed in 100 µL TE buffer. Additionally, six patients undergoing transoral robotic surgery for resection of oropharyngeal cancer were identified, three with p16-negative tumors and three with p16-positive tumors. Intraoperatively, Whatman filter paper was exposed to electrocautery fumes, then placed in 100 uL TE buffer. Additional samples were collected from the suction tubing and filter, the surgical mask of the surgeon at head of the bed, and the robot arm. RESULTS: Samples were analyzed via polymerase chain reaction with an assay sensitivity of 1.5 ng E6E7 DNA. None of the patient or mouse tail samples yielded detectable HPV16 DNA in the electrocautery fumes. We did not detect HPV16 DNA on the surgical masks, suction apparatus, or robot arm intraoperatively. CONCLUSIONS: There is likely minimal risk of occupational exposure to HPV16 via electrocautery fumes. LEVEL OF EVIDENCE: NA Laryngoscope, 130:2366-2371, 2020.

Rhabdomyolysis in a Morbidly Obese Patient After Oral Cavity Free Flap Reconstruction.

Post-operative rhabdomyolysis is a rare but life-threatening condition. Less than ten cases have been described in the otolaryngic literature and, to our knowledge, no reports exist in the setting of oral reconstructive free tissue transfer. Case report presentation. We discuss the clinical course that lead to the diagnosis of rhabdomyolysis with special consideration to simultaneous microvascular anastomosis. Serial lab values were closely followed to prevent kidney injury while preventing flap congestion. Excessive fluid resuscitation in free flap reconstruction has been associated with increased post-operative complications and flap failure. We present a cautionary case to highlight the need for early diagnosis of rhabdomyolysis, a condition that may become more prevalent in the head and neck population as obesity, the main risk factor, continues to increase worldwide.

The role of the innate and adaptive immune response in HPV-associated oropharyngeal squamous cell carcinoma.

Human papilloma virus (HPV) has been implicated in the development of oropharyngeal squamous cell carcinoma (OPSCC) and is directly attributed to its increasing incidence. The immune microenvironment surrounding HPV-associated OPSCC tumors is complex and plays a critical role in the carcinogenic process. The neoplastic mechanism includes cells of the innate immunity such as macrophages, and dendritic cells as well as cells of the adaptive immune process such as CD8+ T-cells. The intricate interactions between these two arms of the immune system allow for a pro-inflammatory and pro-tumorigenic environment. Intensive efforts are underway to gain a greater understanding of the mechanisms involved in the immune system's role in tumor development. This study seeks to summarize the current knowledge pertaining to role of the innate and adaptive immune response in HPV-associated OPSCC. LEVEL OF EVIDENCE: 3a.

Complications, Mortality, and Functional Decline in Patients 80 Years or Older Undergoing Major Head and Neck Ablation and Reconstruction.

Importance: Data regarding outcomes after major head and neck ablation and reconstruction in the growing geriatric population (specifically ≥80 years of age) are limited. Such information would be extremely valuable in preoperative discussions with elderly patients about their surgical risks and expected functional outcomes. Objectives: To identify patient and surgical factors associated with 30-day postoperative complications, 90-day mortality, and 90-day functional decline; to explore whether an association exists between the type of reconstructive procedure and outcome; and to create a preoperative risk stratification system for these outcomes. Design, Setting, and Participants: This retrospective, multi-institutional cohort study included patients 80 years or older undergoing pedicle or free-flap reconstruction after an ablative head and neck surgery from January 1, 2015, to December 31, 2017, at 17 academic centers. Data were analyzed from February 1 through April 20, 2019. Main Outcomes and Measures: Thirty-day serious complication rate, 90-day mortality, and 90-day decline in functional status. Preoperative comorbidity and frailty were assessed using the American Society of Anesthesiologists classification, Adult Comorbidity Evaluation-27 score, and Modified Frailty Index. Multivariable clustered logistic regressions were performed. Conjunctive consolidation was used to create a risk stratification system. Results: Among 376 patients included in the analysis (253 [67.3%] men), 281 (74.7%) underwent free-flap reconstruction. The median age was 83 years (range, 80-98 years). A total of 193 patients (51.3%) had 30-day serious complications, 30 (8.0%) died within 90 days, and 36 of those not dependent at baseline declined to dependent status (11.0%). Type of flap (free vs pedicle, bone vs no bone) was not associated with these outcomes. Variables associated with worse outcomes were age of at least 85 years (odds ratio [OR] for 90-day mortality, 1.19 [95% CI 1.14-1.26]), moderate or severe comorbidities (OR for 30-day complications, 1.80 [95% CI, 1.34-2.41]; OR for 90-day mortality, 3.33 [95% CI, 1.29-8.60]), body mass index (BMI) of less than 25 (OR for 30-day complications, 0.95 [95% CI, 0.91-0.99]), high frailty (OR for 30-day complications, 1.72 [95% CI, 1.10-2.67]), duration of surgery (OR for 90-day functional decline, 2.94 [95% CI, 1.81-4.79]), flap failure (OR for 90-day mortality, 3.56 [95% CI, 1.47-8.62]), additional operations (OR for 30-day complications, 5.40 [95% CI, 3.09-9.43]; OR for 90-day functional decline, 2.94 [95% CI, 1.81-4.79]), and surgery of the maxilla, oral cavity, or oropharynx (OR for 90-day functional decline, 2.51 [95% CI, 1.30-4.85]). Age, BMI, comorbidity, and frailty were consolidated into a novel 3-tier risk classification system. Conclusions and Relevance: Important demographic, clinical, and surgical characteristics were found to be associated with postoperative complications, mortality, and functional decline in patients 80 years or older undergoing major head and neck surgery. Free flap and bony reconstruction were not independently associated with worse outcomes. A novel risk stratification system is presented.

Proliferation and Contributions of National Database Studies in Otolaryngology Literature Published in the United States: 2005-2016.

OBJECTIVE: Health registries and discharge-level databases are powerful tools. Commonly used data sets include the Nationwide Inpatient Sample (NIS); Surveillance, Epidemiology, and End Results Program (SEER); National Cancer Database (NCDB); and American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP). This study investigated the frequency with which these resources are being used and categorized their contributions to literature. DESIGN: A literature review from 2005 to 2016 for papers utilizing the aforementioned databases and publishing in The Laryngoscope, JAMA-Otolaryngology, Head and Neck, Otolaryngology-Head and Neck Surgery, and International Forum of Allergy and Rhinology was conducted. Results were categorized based on the contribution(s) of the paper. The incidence rate of database publications was calculated for each year along with the 95% confidence intervals using a Poisson distribution. RESULTS: Three hundred ten studies were identified. Seventy percent report descriptive findings, and 65% report outcomes/survival. Approximately 18% made clinical recommendations. In 2005, the incidence rate of database publications was 3 per 1000 journal publications (95% CI, 1-9) and remained relatively stable until 2008. From 2010 onward, there was a persistent increase in publications, culminating in the highest incidence rate in 2016 of 26 database publications per 1000 journal publications (95% CI, 20-32). CONCLUSIONS: There was a nearly 10-fold increase in database publications in 2016 compared to 2005. The majority provide descriptive data and outcomes measures. The role of these studies warrants further investigation.

Epidemiology of Dizzy Patient Population in a Neurotology Clinic and Predictors of Peripheral Etiology.

OBJECTIVE: To compare the proportion of peripheral versus nonperipheral dizziness etiologies among all patients, inclusive of those presenting primarily or as referrals, to rank diagnoses in order of frequency, to determine whether or not age and sex predict diagnosis, and to determine which subgroups tended to undergo formal vestibular testing. STUDY DESIGN: Retrospective cohort. SETTING: Academic neurotology clinic. PATIENTS: Age greater than 18 neurotology clinic patients with the chief complaint of dizziness. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Age, sex, diagnosis, record of vestibular testing. RESULTS: Two thousand seventy-nine patients were assigned 2,468 diagnoses, of which 57.7 and 42.3% were of peripheral and nonperipheral etiologies, respectively. The most common diagnoses were Ménière's (23.0%), vestibular migraine (19.3%), benign paroxysmal positional vertigo (BPPV) (19.1%), and central origin, nonmigraine (16.4%). Peripheral diagnoses are more likely to be found in men than in women (odds ratio [OR] 1.59). Peripheral diagnoses were most likely to be found in the 60 to 69 age group (OR 3.82). There was not a significant difference in rate of vestibular testing between women and men. Among patients with two diagnoses, the most common combinations were vestibular migraine and BPPV then vestibular migraine and Ménière's. CONCLUSIONS: A large proportion of patients seen for the chief complaint of dizziness in the neurotology clinic were found not to have a peripheral etiology of their symptoms. These data challenge a prevalent dogma that the most common causes of dizziness are peripheral: BPPV, vestibular neuritis, and Ménière's disease. Age and sex are statistically significant predictors of peripheral etiology of dizziness.

Evaluation of an imaging protocol using ultrasound as the primary diagnostic modality in pediatric patients with superficial soft tissue infections of the face and neck.

OBJECTIVE: To determine the clinical impact of an initiative to use ultrasound (US) as the primary diagnostic modality for children with superficial face and neck infections versus use of computed tomography (CT). METHODS: Children with a diagnosis of lymphadenitis, face or neck abscess, or face and neck cellulitis were retrospectively evaluated by the otolaryngology service. Patients were separated into two groups based on implementation of a departmental initiative to use US as the primary diagnostic modality. The pre-implementation cohort consisted of patients treated prior to the initiative (2006-2009) and the current protocol cohort consisted of patients treated after the initiative was started (2010-2013). Demographics, use of US or CT, necessity of surgical intervention, and failure of medical management were compared. RESULTS: Three hundred seventy three children were evaluated; 114 patients were included in the pre-implementation cohort and 259 patients were included in the current protocol cohort for comparison. Patients presenting during the current protocol period were more likely to undergo US (pre-implementation vs. current protocol, p-value) (12% vs. 49%, p < 0.0001) and less likely to undergo CT (66% vs. 41%, p < 0.0001) for their initial evaluation. There were no differences in the percentage of children who underwent prompt surgical drainage, prompt discharge without surgery, or trial inpatient observation. There were also no differences in the rate of treatment failure for patients undergoing prompt surgery or prompt discharge on antibiotics. For those patients who underwent repeat evaluation following trial medical management, US was used more frequently in the current protocol period (4% vs. 20%, p = 0.002) with no difference in CT use, selected treatment strategy, or treatment failure rates. CONCLUSION: Increased use of US on initial evaluation of children with superficial face and neck infections resulted in decreased CT utilization, without negatively impacting outcome. Decreasing pediatric radiation exposure and potential long-term effects is of primary importance.