Strain-dependent airway hyperresponsiveness and a chromosome 7 locus of elevated lymphocyte numbers in cystic fibrosis transmembrane conductance regulator-deficient mice.

We previously observed the lungs of naive BALB/cJ Cftr(tm1UNC) mice to have greater numbers of lymphocytes, by immunohistochemical staining, than did BALB wild type littermates or C57BL/6J Cftr(tm1UNC) mice. In the present study, we initially investigated whether this mutation in Cftr alters the adaptive immunity phenotype by measuring the lymphocyte populations in the lungs and spleens by FACS and by evaluating CD3-stimulated cytokine secretion, proliferation, and apoptosis responses. Next, we assessed a potential influence of this lymphocyte phenotype on lung function through airway resistance measures. Finally, we mapped the phenotype of pulmonary lymphocyte counts in BALB × C57BL/6J F2 Cftr(tm1UNC) mice and reviewed positional candidate genes. By FACS analysis, both the lungs and spleens of BALB Cftr(tm1UNC) mice had more CD3(+) (both CD4(+) and CD8(+)) cells than did littermates or C57BL/6J Cftr(tm1UNC) mice. Cftr(tm1UNC) and littermate mice of either strain did not differ in anti-CD3-stimulated apoptosis or proliferation levels. Lymphocytes from BALB Cftr(tm1UNC) mice produced more IL-4 and IL-5 and reduced levels of IFN-γ than did littermates, whereas lymphocytes from C57BL/6J Cftr(tm1UNC) mice demonstrated increased Il-17 secretion. BALB Cftr(tm1UNC) mice presented an enhanced airway hyperresponsiveness to methacholine challenge compared with littermates and C57BL/6J Cftr(tm1UNC) mice. A chromosome 7 locus was identified to be linked to lymphocyte numbers, and genetic evaluation of the interval suggests Itgal and Il4ra as candidate genes for this trait. We conclude that the pulmonary phenotype of BALB Cftr(tm1UNC) mice includes airway hyperresponsiveness and increased lymphocyte numbers, with the latter trait being influenced by a chromosome 7 locus.

Feeding outcomes in tracheostomy-dependent infants - can we predict future gastrostomy tube use?

OBJECTIVES: To identify characteristics of infants with tracheostomy that require gastrostomy tube insertion versus those likely to orally feed to predict which patients may benefit from insertion of gastrostomy at the time of tracheostomy placement. METHODS: Retrospective review of infants undergoing tracheostomy from birth to 18 months of age. The primary outcome was to identify pre-operative factors predictive of future gastrostomy tube use. Univariate and multivariate analyses evaluated association between pre-operative patient characteristics and feeding outcomes. RESULTS: Of 103 patients identified, 73 met inclusion criteria. Upper airway anomaly was the indication for tracheostomy in 70.4 %. Gastrostomy tube was required in 52 patients (75.4 %), with 7 (13.5 %) placed concurrently with tracheostomy. Infants with birth complications, a neurologic diagnosis, multiple co-morbidities, or identified with aspiration risk were more likely to require a gastrostomy tube (p < 0.05). CONCLUSIONS: Most infants who require tracheostomy placement from birth until 18 months of age will require nutritional support. Tracheostomy and gastrostomy are uncommonly placed concurrently. Coordination of placement would theoretically minimize the risk of general anesthetic exposure while potentially reducing hospital length of stay and healthcare related costs.

Canadian women in otolaryngology: head and neck surgery part 2-challenges in family planning, fertility, and lactation.

BACKGROUND: Previous literature demonstrates that female surgeons face difficulties in family planning, meeting breastfeeding goals, leadership and advancement opportunities. These issues have received limited attention in Canadian surgeons despite different maternity leave patterns compared to the general Canadian population. We sought to describe the experience of otolaryngologist-head and neck surgeons in family planning, fertility, and lactation and to identify the role of gender and career stage in these experiences. METHODS: A RedCAP® survey was disseminated to Canadian otolaryngology-head and neck surgeons and residents from March to May of 2021 through social media and the national listserv. This survey examined fertility, pregnancy losses, and infant feeding. Major independent variables include gender and career stage (faculty and resident). Dependent variables include respondent experiences with fertility, number of children, and length of parental leave. Responses were tabulated and presented descriptively to communicate the experience of Canadian otolaryngologists. Further, statistical comparisons such as chi-square and t-tests were employed to identify relationships between these variables. Thematic analysis was conducted for narrative comments. RESULTS: We received 183 completed surveys (22% response rate). 54% of females versus 13% of males agreed that career influenced their ability to have children (p = 0.002). 74% of female respondents without children have concerns about future fertility compared to 4% of men (p < 0.001). Furthermore, 80% of women versus 20% of men have concerns about future family planning (p < 0.001). The average maternity leave was 11.5 weeks for residents, and 22.2 weeks for staff. Additionally, significantly more women than men stated that maternity leave impacted advancement opportunities (32% vs. 7%) and salary/remuneration (71% vs. 24%) (p < 0.001). Over 60% of those choosing to pump breastmilk at work reported having inadequate time, space, and breastmilk storage. In total, 62% of breastfed infants were receiving breastmilk at 1 year. CONCLUSION: Canadian female otolaryngologists-head and neck surgeons face challenges in family planning, ability to conceive, and breastfeeding. Focused effort is required to provide an inclusive environment that helps all otolaryngologists-head and neck surgeons achieve both their career and family goals, regardless of gender or career stage.

Canadian Women in Otolaryngology-Head and Neck Surgery part 1: the relationship of gender identity to career trajectory and experiences of harassment.

INTRODUCTION: Women in surgical specialties face different challenges than their male peers. However, there is a paucity of literature exploring these challenges and their effects on a Canadian surgeon's career. METHODS: A REDCap® survey was distributed to Canadian Otolaryngology-Head and Neck Surgery (OHNS) staff and residents in March 2021 using the national society listserv and social media. Questions examined practice patterns, leadership positions, advancement, and experiences of harassment. Gender differences in survey responses were explored. RESULTS: 183 completed surveys were obtained, representing 21.8% of the Canadian society membership [838 members with 205 (24.4%) women]. 83 respondents self-identified as female (40% response rate) and 100 as male (16% response rate). Female respondents reported significantly fewer residency peers and colleagues identifying as their gender (p < .001). Female respondents were significantly less likely to agree with the statement "My department had the same expectations of residents regardless of gender" (p < .001). Similar results were observed in questions about fair evaluation, equal treatment, and leadership opportunities (all p < .001). Male respondents held the majority of department chair (p = .028), site chief (p = .011), and division chief positions (p = .005). Women reported experiencing significantly more verbal sexual harassment during residency (p < .001), and more verbal non-sexual harassment as staff (p = .03) than their male colleagues. In both female residents and staff, this was more likely to originate from patients or family members (p < .03). DISCUSSION: There is a gender difference in the experience and treatment of OHNS residents and staff. By shedding light on this topic, as a specialty we can and must move towards greater diversity and equality.

Surgical residents' approach to training: are elements of deliberate practice observed?

Background: Deliberate practice research has consistently shown that intense, concentrated, goal-oriented practice in a focused domain, such as medicine, can improve skill development and performance. To date, little is known about how surgical residents approach their surgical training, how they evaluate their current weaknesses, and how they plan to transition from one milestone to another. Without knowledge of residents' role in their development, educators miss the opportunity to optimize progression of these lifelong learning skills. Therefore, the purpose of this study was to gain a better understanding of how surgical residents approach their surgical training from the perspective of the surgical residents themselves and to explore if elements of deliberate practice are observed. Methods: Eight surgical trainees participated in one of two focus groups depending on their training level (five junior residents; three senior residents). With the exploratory nature of this research, a focus group methodology was utilized. Results: By employing both deductive and inductive thematic analysis techniques, three themes were extracted from the data: learning resources and strategies, role of a junior/senior, and approaching weaknesses. Conclusions: Although elements of deliberate practice were discussed, higher functioning is necessary to achieve performance excellence, leading to improved patient outcomes.

Changes to the practice of pediatric otolaryngology as a consequence of the COVID-19 pandemic.

BACKGROUND: The COVID-19 pandemic has shifted medical practice globally. The objective of this study was to examine the changes to the practice of pediatric otolaryngology internationally due to the COVID-19 pandemic and examine potential contributors. METHOD: An online survey was designed to assess practice demographics, patterns of COVID-19 related restrictions in communities, and changes to practice and referrals. This was disseminated via an international Covid-19 WhatsApp™ group of pediatric otolaryngologists. RESULTS: There were 45 respondents of 177 group members (25.4%) from 15 countries. The mean estimated time spent under strictest lockdown measures was 16.2 (±10.7) weeks (range: 1-45 weeks). Operating room time was reduced for 82.9%, with an average reported reduction of 41.5%. Almost all (>75%) of respondents reported reduced referrals for five common conditions: otitis media with effusion (average reported decrease - 56.1%); acute otitis media (average decrease 62.8%); acute mastoiditis (average decrease 66.6%); recurrent pharyngotonsillitis (average decrease 51.0%); and peritonsillar abscess (average decrease 52.1%). COVID-19 cases per million population significantly influenced the acuity of referrals received (p < .05). No conditions were reported as increased in frequency and the acuity of most conditions was reported as unchanged by the majority of respondents. CONCLUSION: The measures taken to reduce the spread of COVID-19 have resulted in many changes to pediatric otolaryngology practice and the referral patterns of common conditions. Some of these changes may have enduring sequelae.

Influence of Hoxa5 on p53 tumorigenic outcome in mice.

Hox genes encode transcription factors of crucial importance in the pattern formation of a large spectrum of species. Several studies have now proposed a role for these developmental genes in cancer biology. It has been suggested that HOXA5 possesses growth-suppressive properties through activation of p53 expression in human breast tissue. To assess the genetic cooperation that may exist between Hoxa5 and p53 in tumorigenesis, we generated Hoxa5/p53 compound mutant mice. The presence of Hoxa5 null alleles increased the susceptibility of p53(-/-) mice to develop tumors with a high prevalence for thymic lymphoma, suggesting that the loss of function of the two genes collaborate in tumor formation. To extend our analysis to mammary tumorigenesis, we performed Hoxa5/p53 whole mammary gland transplantations into wild-type hosts. In the p53(-/-) background, the presence of one Hoxa5 mutant allele had no impact on mammary tumor formation. In contrast, the complete loss of Hoxa5 function influenced the tumorigenic outcome of p53(+/-) mammary glands. However, the collaborative nature of this interaction did not depend on the transcriptional regulation of p53 by Hoxa5. Altogether, our data establish that Hoxa5 and p53 cooperate in mammary tumorigenesis in vivo.

A national study of choanal atresia in tertiary care centers in Canada - part II: clinical management.

BACKGROUND: To evaluate the clinical management of choanal atresia (CA) in tertiary centers across Canada. METHODS: Multi-centre case series involving six tertiary care pediatric hospitals across Canada. Retrospective chart review of patients born between 1980 and 2010 diagnosed with choanal atresia to a participating center. RESULTS: The health charts of 215 patients (59.6% female) with choanal atresia (CA) were reviewed. Mean age of initial surgical repair was 0.8 months for bilateral CA, and 48.6 months for unilateral CA. Approaches of surgical repair consisted of endoscopic transnasal (31.7%), non-endoscopic transnasal (42.6%), and transpalatal (25.2%). Stents were used on 70.7% of patients. Forty-nine percent of patients were brought back to the OR for a planned second look; stent removal being the most common reason (86.4%). Surgical success rate of initial surgeries was 54.1%. Surgical technique was not associated with rate of restenosis [χ2 (2) = 1.6, p = .46]. CONCLUSIONS: The present study is the first national multi-institutional study exploring the surgical outcomes of CA over a 30-year period. The surgical repair of CA presents a challenge to otolaryngologists, as the rate of surgical failure is high. The optimal surgical approach, age at surgical repair, use of stents, surgical adjuncts, and need for planned second look warrant further investigation.

A national study of choanal atresia in tertiary care centers in Canada - part I: clinical presentation.

BACKGROUND: To evaluate the clinical presentation of choanal atresia (CA) in tertiary centers across Canada. METHODS: Multi-centre case series involving six tertiary care pediatric hospitals across Canada. Retrospective chart review of patients born between 1980 and 2010 diagnosed with CA at a participating center. RESULTS: The health charts of 215 patients (59.6% female) with CA were reviewed and included in this study. The mean age of patients at time of CA presentation was 0.4 months (range 0.1 to 7.2 months) for bilateral CA and 37.8 months (range 0.1 to 164.1 months) for unilateral cases. The most common presenting symptoms for bilateral CA in decreasing order were respiratory distress (96.4%), feeding difficulties (68.2%), and rhinorrhea (65.5%), and for unilateral cases in decreasing order were rhinorrhea (92.0%), feeding difficulties (24.7%), and respiratory distress (18.0%). For the majority of patients (73.2%), the obstruction comprised mixed bony and membranous tissue, with only 10.5% presenting with a purely membranous obstruction. Familial history of CA was confirmed in only 3.3% of cases. One half of patients with CA presented with one or more associated anomalies and 30.6% had a syndrome. CONCLUSIONS: The present investigation is the first national multi-institutional study evaluating the clinical presentation of CA over three decades. The present cohort of CA patients presented with a breadth of co-morbidities with highly variable presentations, with bilateral cases being more severely affected than unilateral cases. Further investigation into hereditary linkages to CA development is warranted.

Cost and efficiency of myringotomy procedures in minor procedure rooms compared to operating rooms.

OBJECTIVES: Minor pediatric surgeries performed in the minor procedure room (MPR) may be more time efficient and less costly compared to those performed in the operating room (OR). STUDY DESIGN: Retrospective review. METHODS: This was a retrospective study on cost and efficiency differences of bilateral myringotomy with tube insertions performed in the MPR versus the OR. Charts were reviewed from June 2015 to May 2017. Cost data was based on supply cost and case costing of medical personnel including nurses, aides, and anesthesia assistants. RESULTS: Two hundred eighteen patients were included in the study. The median age was 2.7 years (range: 0.8-16.7), and there were no differences in gender between locations. One hundred twenty-three patients had surgery in the MPR (56.4%), and 95 had surgery in the OR (43.6%). The median length of time in the procedure room was 11 minutes shorter for patients who underwent surgery in the MPR (12.0 minutes, range: 3.0-33.0) compared to patients in the OR (23.0 minutes, range: 11.0-52.0; P < .0001). Median hospital stay (2.0 hours vs. 4.3 hours; P < 0.0001) and median patient turnover time (6.0 minutes vs. 14.0 minutes; P < .0001) was shorter in the MPR compared to OR. The total overall cost of a myringotomy with tube insertion, including labor and supply cost, was $189.41 in the MPR compared to $468.56 in the OR, a difference of $279.15 per case. CONCLUSION: Bilateral myringotomy with tube insertions are more time and cost-efficient when performed in the MPR. This study supports the need for increased availability of MPR time for appropriate surgeries. LEVEL OF EVIDENCE: 3 Laryngoscope, 130:242-246, 2020.

Evaluating the impact of adenotonsillectomy for pediatric sleep-disordered breathing on parental sleep.

OBJECTIVES/HYPOTHESIS: To evaluate the impact of adenotonsillectomy for pediatric sleep-disordered breathing (SDB) on parental sleep quality, daytime sleepiness, and child quality of life. STUDY DESIGN: Prospective cohort study. METHODS: Pediatric patients aged 2 to 10 years with SDB and suspected obstructive sleep apnea (OSA) requiring adenotonsillectomy were identified at a single tertiary-care pediatric otolaryngology hospital. Parental daytime sleepiness and quality of sleep were evaluated pre- and postoperatively using the Epworth Sleepiness Scale (ESS) and Pittsburg Sleep Quality Index (PSQI), respectively. Child quality of life, in the context of suspected OSA, was evaluated by the Obstructive Sleep Apnea Quality of Life Survey (OSA-18), pre- and postoperatively. Paired-samples t tests were conducted to analyze data. RESULTS: Forty-seven patients with a mean (standard deviation [SD]) age of 4.9 (2.2) years, participated. Mean (SD) parental age was 35.5 (4.6) years. Statistically significant decreases of 2.1 points were observed between preoperative and postoperative parental mean global ESS (P = .007; 95% confidence interval [CI]: 0.6-3.6) and mean total PSQI (P = .001; 95% CI: 0.9-3.1) scores. A statistically significant improvement (41.6 points) was observed between preoperative and postoperative on mean OSA-18 scores (P < .0001; 95% CI: 35.7-47.6). CONCLUSIONS: Adenotonsillectomy performed in the pediatric population for SDB, with suspected OSA, can positively impact parental daytime sleepiness and sleep quality in addition to pediatric quality of life. LEVEL OF EVIDENCE: 2 Laryngoscope, 130:232-237, 2020.

Association of Tympanostomy Tubes With Future Risk of Advanced Ear Surgery-A Population Study.

OBJECTIVE: To investigate future surgery for chronic ear disease in children who underwent tympanostomy tube (TT) placement, compared with non-surgically treated patients and healthy controls. STUDY DESIGN: Retrospective population-based cohort study. SETTING: All hospitals in the Canadian province of Ontario. PATIENTS/INTERVENTION: Of children aged 18 years and younger, three cohorts were constructed: 1) TT: patients who had undergone at least one TT procedure (n = 193,880), 2) No-TT: patients with recurrent physician visits for middle ear concerns who did not undergo TT (n = 203,283), and 3) Control: an age-sex matched control group who had not had TT or physician visits for recurrent middle ear concerns (n = 961,168). MAIN OUTCOME MEASURES: Risk, and odds ratios (ORs) of surgery for chronic ear disease. RESULTS: The TT cohort had a higher risk of tympanoplasty (OR 9.50 versus No-TT, p < 0.001; OR 207.90 versus Control, p < 0.001), ossiculoplasty (OR 3.22 versus No-TT, p < 0.001; OR 84.13 versus Control, p < 0.001), atticotomy (OR 4.41 versus No-TT, p < 0.001; OR 44.78 versus Control, p < 0.001), and mastoidectomy (OR 3.22 versus No-TT, p < 0.001; OR 89.12 versus control, p < 0.001). CONCLUSION: This study describes the population risk of subsequent ear surgeries in TT patients. These TT patients have a significantly higher risk of surgery for chronic ear disease versus those patients with recurrent middle ear disease that did not undergo TT, and age-sex matched controls.

Conceptualizing and measuring confidence in older drivers: development of the day and night driving comfort scales.

OBJECTIVE: To examine and measure driving confidence from the perspective of older adults. DESIGN: Used focus groups for construct examination, item generation, and ratings; conducted psychometric testing using Rasch analysis for scale refinement; examined test-retest reliability and associations with driver characteristics and driving habits. SETTING: Retirement complexes and seniors' housing and centers in Ontario, Canada. PARTICIPANTS: Convenience samples of current drivers (n=143) (range, 66-92y) and 7 counselors. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: The Day (DCS-D) and Night (DCS-N) Driving Comfort Scales developed inductively with older drivers. RESULTS: Older drivers believed that it was important to consider confidence in their own abilities and discomfort caused by other drivers, to separate day and night driving, and to specify the driving context (eg, traffic flow, speed). Rasch analysis showed that the final 13-item DCS-D and 16-item DCS-N were both hierarchic and unidimensional, with good person (.89, .96) and item (.98, .97) reliabilities, respectively. Test-retest reliability was adequate for the DCS-D (intraclass correlation coefficient [ICC]=.7) and good for the DCS-N (ICC=.88). Scores were significantly associated with reported driving frequency, situational avoidance, and perceived abilities (P<.001). CONCLUSIONS: The Driving Comfort Scales are promising new tools for research and practice.

Association between symptomatic submucous cleft palate and otologic disease: A retrospective review.

INTRODUCTION: Submucous cleft palate (SMCP) is the most common congenital malformation of the posterior palate and characterized in part by palatal muscle diastasis. Patients with SMCP are considered symptomatic when suffering from velopharyngeal insufficiency which leads to hypernasality of speech and excess nasal air emission. SMCP results from defects in the muscles thought to be responsible for regulating the patency of the eustachian tube which can lead to a number of middle ear pathologies and ultimately hearing loss. Hearing loss, especially at a young age, can make speech acquisition a challenge. The purpose of this study was to review patients with symptomatic SMCP (SSMCP) who have presented to our center and report on the association between SSMCP and otologic disease. METHODS: This study was a retrospective review of all patients presenting to our center between 2004 and 2016. Patients with SSMCP were identified through a patient database maintained on site. Inclusion criteria were diagnosis of SMCP and documentation of the presence or absence of otologic disease. Once identified patient records were reviewed and various demographic and patient factors were recorded. Patients were then grouped into cohorts of those with and without otologic disease and those requiring tympanostomy tubes and not. T-tests were then used to compare various factors between cohorts. RESULTS: A total of 73 patients were identified and 58 met inclusion criteria (mean age 5.8 years, male:female 36:22). 27.5% of patients were diagnosed with a genetic condition. 69% of patients had otologic disease and 47% required at least one set of bilateral tympanostomy myringotomy tubes. The cohort with ear disease tended to have worse scores on ACPA testing though this was not statistically significant. There were no significant demographic differences between the cohorts. CONCLUSIONS: Patients with symptomatic SMCP suffer from a higher incidence of otologic disease and bilateral myringotomy tube placement than the general population. This is an important potential comorbidity in SSMCP patients as it can act as a further barrier to speech acquisition. Further research is needed to determine if otologic disease can be used for prognostication or treatment purposes.

The prevalence of human papillomavirus in pediatric tonsils: a systematic review of the literature.

BACKGROUND: HPV-related head and neck cancer rates have been increasing in recent years, with the tonsils being the most commonly affected site. However, the current rate of HPV infection in the pediatric population remains poorly defined. The objective of this study was to systematically review and evaluate the prevalence and distribution of HPV in the tonsils of pediatric patients undergoing routine tonsillectomy. METHODS AND RESULTS: The literature was searched using PubMed, EMBASE, Scopus, CINAHL, Cochrane Library, and ProQuest Dissertations & Theses Global databases (inception to December 2017) by two independent review authors. Inclusion criteria included articles which evaluated the prevalence of HPV in a pediatric cohort without known warts or recurrent respiratory papillomatosis, those which used tonsil biopsy specimens for analysis, and those with six or more subjects and clear outcomes reported. Eleven studies met the inclusion criteria. Using the Oxford Clinical Evidence-based Medicine (OCEBM) guidelines, two reviewers appraised the level of evidence of each study, extracted data, and resolved discrepancies by consensus. The systematic review identified 11 articles (n = 2520). Seven studies detected HPV in the subject population, with prevalence values ranging from 0 to 21%. The level of evidence for all included studies was OCEBM Level 3. CONCLUSIONS: HPV may be present in pediatric tonsillectomy specimens; however, the largest included study demonstrated a prevalence of 0%. Future testing should be performed using methods with high sensitivities and specificities, such as reverse transcript real-time PCR or digital droplet PCR.

Blinded randomized controlled study of a web-based otoscopy simulator in undergraduate medical education.

OBJECTIVES/HYPOTHESIS: OtoTrain is a Web-based otoscopy simulator that has previously been shown to have face and content validity. The objective of this study was to evaluate the effectiveness of this Web-based otoscopy simulator in teaching diagnostic otoscopy to novice learners STUDY DESIGN: Prospective, blinded randomized control trial. METHODS: Second-year medical students were invited to participate in the study. A pretest consisted of a series of otoscopy videos followed by an open-answer format assessment pertaining to the characteristics and diagnosis of each video. Participants were then randomly divided into a control group and a simulator group. Following the pretest, both groups attended standard otology lectures, but the simulator group was additionally given unlimited access to OtoTrain for 1 week. A post-test was completed using a separate set of otoscopy videos. Tests were graded based on a comprehensive marking scheme. The pretest and post-test were anonymized, and the three evaluators were blinded to student allotment. RESULTS: A total of 41 medical students were enrolled in the study and randomized to the control group (n = 20) and the simulator group (n = 21). There was no significant difference between the two groups on their pretest scores. With the standard otology lectures, the control group had a 31% improvement in their post-test score (mean ± standard error of the mean, 30.4 ± 1.5) compared with their pretest score (23.3 ± 1.8) (P < .001). The simulator group had the addition of OtoTrain to the otology lectures, and their score improved by 71% on their post-test (37.8 ± 1.6) compared to their pretest (22.1 ± 1.9) (P < .001). Comparing the post-test results, the simulator group had a 24% higher score than the control group (P < .002). Inter-rater reliability between the blinded evaluators was excellent (r = 0.953, P < .001). CONCLUSIONS: The use of OtoTrain increased the diagnostic otoscopic performance in novice learners. OtoTrain may be an effective teaching adjunct for undergraduate medical students. LEVEL OF EVIDENCE: 1b. Laryngoscope, 127:1306-1311, 2017.

Pediatric teratoma and dermoid cysts.

Teratomas and dermoid cysts are germ cell neoplasms. This article focuses on cervical and craniofacial teratomas. Presentation of these neoplasms varies in degree of severity, from cosmetic deformities to airway distress requiring emergent intervention. Nasal lesions (particularly if suspicious for a nasal dermoid) require imaging before biopsy to assess for intracranial extension. Treatment consists of airway management if respiratory distress is present, and early surgical intervention. Postoperative follow-up is required to monitor for recurrence.

Effects of type of added salt and ionic strength on physicochemical and functional properties of casein isolates produced by electroacidification.

A procedure developed for soybean protein precipitation which was based on electrodialysis was tested for the production of acid casein from reconstituted skim milk. In a previous paper, the performance of bipolar membrane electroacidification (BMEA) was evaluated under different conditions of ionic strength (micro(added) = 0, 0.25, 0.5, or 1.0 M) and added salt (CaCl(2), NaCl, or KCl) (1). The aim of this study, which is the complement of the work on evaluation of BMEA performance, was to evaluate the functionality of the protein isolates produced by BMEA and to compare the BMEA isolates to commercial isolates and an isolate produced by chemical acidification. It was not possible to show differences between the functional properties of isolates produced by BMEA, except at 1 M CaCl(2) micro(added), due to the variability of the isolates. However, the results showed that it is possible to obtain isolates similar to commercial isolates and that the addition of salt during the process does not induce variations in functional properties. From results on mineral concentrations, it appeared that the addition of monovalent cations did not influence the retention of monovalent or divalent cations in the BMEA isolates, while addition of divalent cations (CaCl(2)) influenced the retention of magnesium. According to previous results on evaluation of BMEA performances under different conditions of ionic strength and added salt, the difference observed for the BMEA isolate produced at 1.0 M CaCl(2) was confirmed.

Endolymphatic sac surgery versus intratympanic gentamicin for the treatment of intractable Ménière's disease: a retrospective review with survey.

OBJECTIVES: 1) To review a 10-year experience of endolymphatic sac surgery (ESS) and intratympanic gentamicin (ITG) for intractable Ménière's disease (MD), and 2) to compare preoperative and postoperative outcomes. DESIGN: Retrospective chart review and survey. SETTING: Tertiary care center. PATIENTS: Patients treated with ESS or ITG between 1997 and 2007 at London Health Sciences Centre were eligible for recruitment. INTERVENTIONS: ESS or ITG. MAIN OUTCOMES: 1) 1995 American Academy of Otolaryngology-Head and Neck Surgery hearing stage, vertigo class, and functional level; and 2) a 40-item validated quality-of-life questionnaire (MD Outcome Questionnaire). STATISTICAL ANALYSES: Chi-squared and t tests. RESULTS: Sixty-seven patients were recruited (n = 30 ESS; n = 37 ITG). Preoperatively, the ITG group had poorer hearing stage (p = 0.03). There were no differences between groups on preoperative functional level and QOL measures. Postoperatively, ESS patients reported more tinnitus (p = 0.003) and aural fullness (p = 0.01). There were no differences in posttreatment vertigo class. Secondary treatment was required for 27% of patients in the ESS compared with 3% in the ITG. Posttreatment hearing remained unchanged for the ITG and was overall decreased in the ESS group (p = 0.03). Participants in the ITG reported better postoperative functional levels (p = 0.02) and higher global (p = 0.04), social (p = 0.001), and overall QOL scores (p = 0.03). CONCLUSION: ITG, compared with ESS, reveals better posttreatment functional levels, and superior global, social, and overall QOL scores. Although no statistical difference in vertigo class, a clinical difference is observed.