Is ChatGPT accurate and reliable in answering questions regarding head and neck cancer?

Background and objective: Chat Generative Pre-trained Transformer (ChatGPT) is an artificial intelligence (AI)-based language processing model using deep learning to create human-like text dialogue. It has been a popular source of information covering vast number of topics including medicine. Patient education in head and neck cancer (HNC) is crucial to enhance the understanding of patients about their medical condition, diagnosis, and treatment options. Therefore, this study aims to examine the accuracy and reliability of ChatGPT in answering questions regarding HNC. Methods: 154 head and neck cancer-related questions were compiled from sources including professional societies, institutions, patient support groups, and social media. These questions were categorized into topics like basic knowledge, diagnosis, treatment, recovery, operative risks, complications, follow-up, and cancer prevention. ChatGPT was queried with each question, and two experienced head and neck surgeons assessed each response independently for accuracy and reproducibility. Responses were rated on a scale: (1) comprehensive/correct, (2) incomplete/partially correct, (3) a mix of accurate and inaccurate/misleading, and (4) completely inaccurate/irrelevant. Discrepancies in grading were resolved by a third reviewer. Reproducibility was evaluated by repeating questions and analyzing grading consistency. Results: ChatGPT yielded "comprehensive/correct" responses to 133/154 (86.4%) of the questions whereas, rates of "incomplete/partially correct" and "mixed with accurate and inaccurate data/misleading" responses were 11% and 2.6%, respectively. There were no "completely inaccurate/irrelevant" responses. According to category, the model provided "comprehensive/correct" answers to 80.6% of questions regarding "basic knowledge", 92.6% related to "diagnosis", 88.9% related to "treatment", 80% related to "recovery - operative risks - complications - follow-up", 100% related to "cancer prevention" and 92.9% related to "other". There was not any significant difference between the categories regarding the grades of ChatGPT responses (p=0.88). The rate of reproducibility was 94.1% (145 of 154 questions). Conclusion: ChatGPT generated substantially accurate and reproducible information to diverse medical queries related to HNC. Despite its limitations, it can be a useful source of information for both patients and medical professionals. With further developments in the model, ChatGPT can also play a crucial role in clinical decision support to provide the clinicians with up-to-date information.

Evaluation of sarcopenia as a prognostic biomarker in locally advanced head and neck squamous cell carcinoma.

Background: We aimed to evaluate the effect of sarcopenia on survival in head and neck squamous cell carcinoma patients treated with chemoradiotherapy. Materials & methods: Disease-free survival and overall survival were compared according to cervical computed tomography for radiotherapy in 123 sarcopenic and non-sarcopenic patients with locally advanced head and neck squamous cell carcinoma treated with chemoradiotherapy with weekly cisplatin. Results: In multivariate analyses, pretreatment sarcopenia was associated with lower disease-free survival (hazard ratio: 2.60; 95% CI: 1.38-4.87; p = 0.003) and overall survival (hazard ratio: 2.86; 95% CI: 1.40-5.85; p = 0.004). Sarcopenic patients experienced more frequent radiotherapy-related toxicities and platinum-related side effects than non-sarcopenic patients. Conclusion: Sarcopenia could be a potential biomarker to predict prognosis and treatment toxicity in head and neck squamous cell carcinoma.

Head and neck cancer is one of the main causes of cancer-related death worldwide. Most patients are diagnosed in the advanced stage. Muscle wasting with significant weight loss occurs in nearly half of the patients at the initial diagnosis. In oncology research, sarcopenia has often been described as the loss of skeletal muscle mass. In this study, we evaluated the effect of sarcopenia on survival in head and neck cancer patients. Muscle mass was calculated using information from head and neck computed tomography before radiotherapy treatment in patients. We showed that patients with low muscle mass had significantly worse survival rates and were more susceptible to treatment-related side effects. Sarcopenia may function as a marker showing the course of disease in patients with head and neck cancer.

Comprehensive evaluation of velopharyngeal function in myasthenia gravis patients.

PURPOSE: Hypernasality, which is a symptom of dysarthria, may be seen in patients with Myasthenia Gravis with bulbar symptoms. However, there is not enough evidence to show that these patients may have velopharyngeal dysfunction. This study investigates the features of velopharyngeal function in myasthenia gravis patients using objective and subjective measurement tools. METHODS: Ten adult myasthenia gravis patients with bulbar symptoms and ten adult myasthenia gravis patients without bulbar symptoms were recruited for this study. Ten healthy subjects were also included as the control group. The nasalance scores of the participants were determined using a nasometer. The degree and pattern of velopharyngeal closure were scored using flexible nasoendoscopy during speech, blowing, dry swallowing, and food swallowing. Perceptual hypernasality was assessed. RESULTS: Velopharyngeal dysfunction was detected in 50% of the myasthenia gravis patients with bulbar symptoms. Velopharyngeal dysfunction was not seen in myasthenia gravis patients without bulbar symptoms. The degree of velopharyngeal closure in patients with bulbar symptoms differed depending on the tasks being performed. No significant difference in velopharyngeal closure patterns was observed between the groups (p < 0.05). CONCLUSION: Myasthenia gravis patients with bulbar involvement may have velopharyngeal dysfunction. It is important to conduct a comprehensive evaluation to assess all aspects of the velopharyngeal function.

Investigation of the Effect of Radiotherapy Dose on Chewing and Swallowing Structures in Head and Neck Cancer Patients Treated with Concomitant Chemoradiotherapy.

Intensity-modulated radiotherapy (IMRT) is a treatment method that is used in the treatment of head and neck cancers. Impairment of chewing and swallowing functions in the early and late periods of radiotherapy is frequent. Therefore, revealing the dose-effect relationship is important. The main purpose of this study is to investigate the dose-effect relationship between chewing and swallowing structures objectively via a standardized videofluoroscopy protocol. The study included 35 participants treated with chemo-IMRT. A videofluoroscopic swallowing study (VFSS) was performed before IMRT, and 3 and 6 months after IMRT. VFSS results were scored according to the Modified Barium Swallow Impairment Profile (MBSImP) and the Penetration-Aspiration Scale (PAS). Maximum interincisor mouth opening, body mass index (BMI), and Functional Oral Intake Scale levels were determined in these cases. The quality of life of participants was evaluated. There was a significant increase in PAS and MBSImP scores and a significant decrease in BMI scores of the patients after treatment. Xerotomy and sticky saliva complaints increased after treatment. The dose to the mastication muscles (> 40 Gy) and the temporomandibular joint (> 46 Gy) were found to be associated with a decrease in BMI; the dose to the superior pharyngeal constructor muscle (> 58 Gy) was found to be associated with pharyngeal stripping wave. The presence of aspiration was associated with the inferior pharyngeal constructor muscle, glottic larynx, supraglottic larynx, and upper esophageal sphincter. Important findings to emerge from this study include detected toxic dose limits. These findings may guide physicians to minimize the side effects of IMRT.

Development and validation of an improved classification and risk stratification system for carotid body tumors: Multinational collaborative cohort study.

BACKGROUND: This study aims to develop and validate a new classification system that better predicts combined risk of neurological and neurovascular complications following CBT surgery, crucial for treatment decision-making. METHODS: Multinational retrospective cohort study with 199 consecutive cases. A cohort of 132 CBT cases was used to develop the new classification. To undertake external validation, assessment was made between the actual complication rate and predicted risk by the model on an independent cohort (n = 67). RESULTS: Univariate analyses showed statistically significant associations between developing a complication and the following factors: craniocaudal dimension, volume, Shamblin classification, and Mehanna types. In the multivariate prognostic model, only Mehanna type remained as a significant risk predictor. The risk of developing complications increases with increasing Mehanna type. CONCLUSIONS: We have developed and then validated a new classification and risk stratification system for CBTs, which demonstrated better prognostic power for the risk of developing neurovascular complications after surgery.

Does Submandibular Gland Sacrificing Neck Dissection Decrease Salivary Output and Quality of Life?

PURPOSE: Our study aimed to quantify the impact of submandibular gland (SMG) resection during Level I neck dissection (ND) on stimulated salivary output (SSO) and xerostomia-related quality of life in patients with head and neck cancer (HNC). METHODS: A retrospective cohort was formed from 32 patients that underwent unilateral or bilateral Level I ND and a control group of 23 patients that had level II-IV ND. SSO (Saxon test) and University of Washington Quality of Life survey results for both groups were compared. RESULTS: Mean SSO was 3.41 g in the SMG resection group and 3.86 g in the control group, with no significant statistical difference. There was no difference in mean SSO between patients with 2 SMGs, a single remaining SMG, or no glands. The mean SSO of SMG resection cases with a history of adjuvant RT was 2.61 g which was below the xerostomia threshold for the Saxon test (2.75 g) and control group patients with RT had a significantly higher mean SSO (4.07 g). The lowest UW-QoL saliva domain score average (53.8) was in the SMG-resected, RT-positive group. CONCLUSION: Results indicate unilateral or bilateral resection of SMG does not reduce SSO to a significant extent. Adjuvant radiotherapy and SMG resection are additive risk factors for xerostomia and the related loss in quality of life. SMG sparing may be necessary in HNC patients with higher risk for the need of adjuvant radiation.

Reliability and Validity of the Turkish Reflux Symptom Index.

OBJECTIVE: To validate and assess reliability of the Turkish Reflux Symptom Index (T-RSI). STUDY DESIGN: Cross-sectional case-control study. MATERIALS AND METHODS: A Turkish version of the original American English RSI was developed. One hundred thirty-two patients with a Reflux Finding Score (RFS) > 7, and 162 healthy controls (HC) with RFS ≤7 were included in the study. To assess reliability, the T-RSI was scored twice, within a 7-14 day window. For construct validity, the scores obtained in the study group were compared to the scores from the HC group. A correlation between RSI and RFS was assessed to determine content validity. Finally, sensitivity and specificity of the index was calculated using a receiver operating characteristic curve analysis. RESULTS: The T-RSI showed excellent internal consistency (Cronbach`s α = 0.912). Item-total correlation coefficients ranged between 0.572 and 0.773. The Pearson product-moment correlation test indicated that the T-RSI is a reliable tool (r = 0.931, n = 107, P < 0.001). There were significant difference between the study group and the HC group for the mean RSI scores (18.15 ± 7.31 and 7.88 ± 5.32, P < 0.001 respectively). The mean RFS score in the patients was 12.57 and the correlation between RFS score and RSI score was high (r = 0.704). According to the receiver operating characteristic curve analysis the area under curve of the T-RSI was 0.892. The optimal cut-off value was 12.5 with a sensitivity of 82.6% and a specificity of 84.6%. CONCLUSION: The T-RSI is an easily administered, reliable, and valid instrument for assessing symptoms thought to be related to laryngopharyngeal reflux. A score of T-RSI greater than 12.5 is similar to an RSI score of >13 considered symptomatic for laryngopharyngeal reflux.

Validity and Reliability of the Turkish SingingVoice Handicap Index-10.

OBJECTIVE: To evaluate the validity and reliability of the Turkish version of the Singing Voice Handicap Index-10 (SVHI-10). STUDY DESIGN: Cross-sectional study. METHODS: Two hundred singers consisting of a control group (n = 136) without voice complaints and a study group (n = 64) diagnosed with a voice disorder served as participants. To detect test-retest reliability, 97 participants (representing a portion of both the control and study group participants) completed the index twice with a minimum of a one-week interval between each completion. Internal consistency was confirmed using Cronbach's alpha coefficient. To complete a clinical validity assessment, scores from the control group participants were compared with scores from the study group participants. To determine content validity, the correlation between the SVHI-10 and the participants' perceptions of singing voice complaints was researched. The sensitivity and specificity of the SVHI-10/Turkish version were calculated using a receiver operating characteristic curve analysis. RESULTS: Cronbach's alpha coefficient, which was equal to 0.91, proved to have excellent internal consistency. Item-total correlations were found in the range of 0.55 to 0.76. The mean SVHI-10/Turkish score for the control group was 8.14 ± 5.4, whereas this value was significantly higher in the study group (20.54 ± 6.9, P < 0.001). The Pearson product-moment correlation test indicated that the Turkish SVHI-10 is a reliable tool (r = 0.90, n = 97, P < 0.001). The area under curve of the Turkish SVHI-10 was 0.95. The optimal cut-off point was found to be 11.5, with a sensitivity of 95.8% and a specificity of 83.2%. CONCLUSIONS: The Turkish version of the SVHI-10 has proven to be a reliable and valid instrument for evaluating the self-perception of a singer in relation to voice problems. It can also be used as a quick screening tool because a score on the SVHI-10 higher than 11.5 is indicative of an abnormal singer's perceived voice handicap.

Anterior Glottic Web Formation for Voice Feminization: Experience of 27 Patients.

OBJECTIVE: Voice feminization is needed for male-to-female transsexuals, males with testicular feminization, and females with constitutional androphonia. Anterior glottic web formation affords advantages: endoscopic surgery without skin incision and scar, outpatient surgery, potential reversibility, and low risk for vocal fold and airway damage. STUDY DESIGN: This is a nonrandomized prospective cohort study. SETTING: University hospital. MATERIALS AND METHODS: All 27 cases of androphonia were treated with endoscopic anterior glottic web formation. Voice Handicap Index (VHI-30); acoustic analysis with /a/ including F0, jitter, shimmer, noise-to-harmonic ratio; and acoustic analysis of connected speech for speaking F0 were determined pre- and postoperatively. Patients and medical students rated pre- and postoperative voices as feminine, masculine, or neither. RESULTS: The pre- and postoperative mean total VHI scores of patients were 38 and 24, respectively; this difference was statistically significant (P < 0.001). Their pre- and postoperative mean F0 and speaking F0 were 152 and 158 and 195 and 200 Hz, respectively; these differences were statistically significant (P < 0.001). Their pre- and postoperative acoustic analysis results were not significantly different (P > 0.05). Seven patients (26%) needed laser reduction glottoplasty for voice feminization because they were not satisfied with the voice result. Patients' self-evaluations of their postoperative voice revealed 20 feminine, 2 masculine, and 5 neither results, giving a rise to patient satisfaction rate of 74%. Medical students rated 85% of postoperative voice samples as feminine, giving rise to overall success rate of 85%. CONCLUSION: Anterior commissure web formation is a successful surgical option for voice feminization. However, additional surgery may be necessary for patient satisfaction.

Acute Invasive Fungal Rhinosinusitis: Presentation of 19 Cases, Review of the Literature, and a New Classification System.

PURPOSE: The aim of this study was to determine the correlation between acute invasive fungal rhinosinusitis (AIFRS) and underlying diseases, micro-organisms, presenting symptoms, extent of disease, radiologic findings, and outcomes and propose a new classification system. MATERIALS AND METHODS: The data of 19 AIFRS cases were analyzed retrospectively. Magnetic resonance imaging and computed tomography were performed in all patients preoperatively. All patients underwent at least 1 surgical debridement. RESULTS: Hematologic diseases were the most common (52%) underlying diseases. Patients with type 2 diabetes and those with multiple etiologies causing immunosuppression had the lowest survival. Aspergillus and Mucoraceae species were isolated in 9 patients but were not associated with poor prognosis. Headache and nasal discharge or crusting were the most common presenting symptoms. Premaxillary involvement was significantly correlated with poor prognosis (P = .001). Unilateral involvement was correlated with poor prognosis, although this finding was not significant (P = .111). The overall mortality rate was 61.2%. Patients with neutropenia that was corrected had 80% survival (P = .014). Cessation of corticosteroids and regulating blood glucose levels in patients with immunosuppression from corticosteroid use resulted in 75% survival. CONCLUSION: There is no single curative treatment for AIFRS. For a favorable prognosis, underlying conditions must be treated in addition to surgical debridement and antifungals.

Parotidectomy outcomes, diagnosis and complications on pediatric patients; Twelve years of experiences in a tertiary care center.

The aim of this study is to evaluate parotid masses management in pediatric population. From June 2002 to December 2014, 13 patients under the age of 18 with parotid tumors were treated via surgery at Hacettepe University Department of Otorhinolaryngology. Information on patients' demographics, clinical and histopathologic tumor characteristics and treatment modalities with results was obtained from medical records, retrospectively. The age was ranging between 8-17 years. Ten (76.9%) patients had benign tumors and 8 (61.5%) of them were pleomorphic adenoma. One case had chronic sialadenitis with sialolithiasis and one patient had fluoride follicular hyperplasia. Three patients had malignant tumors; two of them were adenoid cystic carcinoma and one case of malignant melanoma metastasis. Twelve cases had undergone partial parotidectomy. Only one total parotidectomy was performed which was the patient with malignant melanoma. None of the patients had major complications or facial nerve palsy. During the 3 years follow up period, recurrence or Frey syndrome had not been detected but the case with malignant melanoma had distant metastasis during the follow up time. Although pediatric parotid masses are unusual, they can represent a variety of pathological diagnoses, including malignancy. Parotidectomy remains the mainstay of treatment and surgical experience is needed for low complication rates especially in children.

Total and Partial Laser Arytenoidectomy for Bilateral Vocal Fold Paralysis.

Introduction. Treatment for bilateral vocal fold paralysis (BVFP) has evolved from external irreversible procedures to endolaryngeal laser surgery with greater focus on anatomic and functional preservation. Since the introduction of endolaryngeal laser arytenoidectomy, certain modifications have been described, such as partial resection procedures and mucosa sparing techniques as opposed to total arytenoidectomy. Discussion. The primary outcome measure in studies on BVFP treatment using total or partial arytenoidectomy is avoidance of tracheotomy or decannulation and reported success ranges between 90 and 100% in this regard. Phonation is invariably affected and arytenoidectomy worsens both aerodynamic and acoustic vocal properties. Recent reports indicate that partial and total arytenoidectomies have similar outcome in respect to phonation and swallowing. We use CO2 laser assisted partial arytenoidectomy with a posteromedially based mucosal flap for primary cases and reserve total arytenoidectomy for revision. Lateral suturing of preserved mucosa provides tension on the vocal fold leading to better voice and leaves no raw surgical field to unpredictable scarring or granulation. Conclusion. Arytenoidectomy as a permanent static procedure remains a traditional yet sound choice in the treatment of BVFP. Laser dissection provides a precise dissection in a narrow surgical field and the possibility to perform partial arytenoidectomy.

The role of suprahyoid neck dissection in the treatment of squamous cell carcinoma of the lower lip: 20 years' experience at a Tertiary Center.

PURPOSE: To evaluate the efficacy of L1-2ND in the management of the lower lip squamous cell carcinoma and to achieve the highest cure rates with adequate neck dissection. METHODS: A retrospective review was completed on patients treated between 1994 and 2014. The case histories of 184 patients who were treated with surgical excision of the primary tumor along with neck dissection, and 24 patients who were treated only with surgical excision without neck dissection at another center, were studied. All patients were followed up for evidence of recurrent disease. RESULTS: In 208 patients (193 men, 15 women) with a mean age of 51 years, 12 were N1, 3 were N2, and 169 were N0; 24 patients had undergone operation at another center without neck dissection. Lymph node metastases were present in 34 patients (18.4%) with dissected necks and occult metastases were detected in 19 patients with clinically N0 necks (11.2%). The median follow-up of each patient was 28 months. Only 1 patient developed neck recurrence, and there was no local recurrence. The overall survival rate (OAS) of patients with clinical N0 disease who underwent neck dissection was 94.7%; the OAS of the patients who were not treated with neck dissection was 29.1%. CONCLUSION: Level 1-2 neck dissection (L1-2ND) is the treatment of choice for controlling neck disease in patients with lower lip carcinoma, and serves as a staging procedure to detect patients who require adjuvant therapy.

The rising incidence of papillary thyroid microcarcinoma and is completion surgery necessary or not?

Papillary thyroid microcarcinoma (PTMC) is defined as a papillary cancer that is 1 cm or less in its maximal diameter. The incidence of thyroid cancer has increased during the past 30 years. The aim of this study is to evaluate the rising incidence of PTMC (papillary thyroid microcarcinoma) and whether is lobectomy enough or not. The data of 462 consecutive patients who underwent thyroidectomy (hemithyroidectomy and total thyroidectomy) at the Hacettepe University Hospitals Department of ENT from 2000 to 2015 were analyzed. Surgical procedure, histopathologic examinations, postoperative complications, follow-up time and mortality were recorded. USG and FNAC were performed on all cases. Of the 344 patients with thyroid malignancy and 118 patients underwent total laryngectomy with thyroidectomy. 364 patients with TT and 98 patients with HT. The first group included 204 patients (Surgery time 2000-2007), 91 of them ( 44.6%) had PTMC. The second group included 258 patients, 192of them (74,4%) had PTMC (p&lt;0.001). 22 Patients with PTMC underwent completion surgery and 40 of them just followed by hemithyroidectomy. There was no recurrence. PTMC has been rising incidence because of ,pathological and radiological, increased awareness and completion surgery is not necessary for all PTMC cases especially incidental PTMC.

The rising incidence of papillary thyroid microcarcinoma and is completion surgery necessary or not?

Papillary thyroid microcarcinoma (PTMC) is defined as a papillary cancer that is 1 cm or less in its maximal diameter. The incidence of thyroid cancer has increased during the past 30 years. The aim of this study is to evaluate the rising incidence of PTMC (papillary thyroid microcarcinoma) and whether is lobectomy enough or not. The data of 462 consecutive patients who underwent thyroidectomy (hemithyroidectomy and total thyroidectomy) at the Hacettepe University Hospitals Department of ENT from 2000 to 2015 were analyzed. Surgical procedure, histopathologic examinations, postoperative complications, follow-up time and mortality were recorded. USG and FNAC were performed on all cases. Of the 344 patients with thyroid malignancy and 118 patients underwent total laryngectomy with thyroidectomy. 364 patients with TT and 98 patients with HT. The first group included 204 patients (Surgery time 2000-2007), 91 of them ( 44.6%) had PTMC. The second group included 258 patients, 192of them (74,4%) had PTMC (p<0.001). 22 Patients with PTMC underwent completion surgery and 40 of them just followed by hemithyroidectomy. There was no recurrence. PTMC has been rising incidence because of ,pathological and radiological, increased awareness and completion surgery is not necessary for all PTMC cases especially incidental PTMC.

Otorhinolaryngological, audiovestibular and swallowing manifestations of patients with Niemann-Pick disease Type C.

OBJECTIVES: The aim of this study is to evaluate audiovestibular and swallowing impairment of patients with NPC. METHODS: Audiovestibular and swallowing evaluation were performed on patients with Niemann-Pick disease type C (NPC) at Hacettepe University between 20013 and 2015 prospectively. Pure-tone audiometry (PTA), Auditory Brain stem response (ABR), Flexible endoscopic evaluation of swallowing (FEES) test and posturography were done. Hearing, swallowing and balance states were measured. RESULTS: There were 16 patients (5 male and 11 female, with a median age of 6.5 years old). The most common ABR abnormalities observed were absent waves I and III (%70 absent I waves, %43.75 absent III waves). Twelve of sixteen patients (%75) had an ABR abnormality in at least one ear, of these, four patients had normal hearing and three of them had periferal hearing loss. 12 (75%) patients had complaint of postural imbalance. 11(69%) of patients had peripheral and one (6%) patient had central impairment. Nine of sixteen patients (56.25%) show some degree of dysphagia (either penetration or aspiration). Two patients (12.5%) showed aspiration both liquid and viscous nutrition. Three patients (18.75%) showed aspiration primarily in liquids and two of them had penetration with viscous nutrition. Three patients (18.75%) had penetration with no aspiration neither liquid nor viscous nutrition (PEN-ASP score was 3, 3, 5, respectively). CONCLUSION: There is no curative treatment for this devastating and fatal disorder and hearing impairment, balance and swallowing disorders can be seen especially late onset form of disease.

Parapharyngeal giant ganglioneuroma with multifocal bone involvement in a pediatric female patient.

Ganglioneuroma is a rare benign tumor that originates from neural crest. Tumor tends to be slow growing, asymptomatic but can cause symptoms because of pressure to neighboring structures. In the head and neck region they are relatively rarely seen. We hereby present a rare case of multiple ganglioneuromas that were located in parapharyngeal space, iliac bone and other bones in a 13-year-old girl. Patient underwent surgery for the excision of a large mass, extending from parapharyngeal space to neck, with transparotid and transcervical combined approach. After operation, MIBG (iodine-123-meta-iodobenzylguanidine) scintigraphy was performed and involvement of parietooccipital bone, lumbal vertebra, right iliac wing medial cortex and left humerus were detected. No adjuvant therapy was given to the patient. There is no evidence of recurrence in the head and neck region in the following 12 months. In conclusion, complete surgical excision of the tumor, if possible, is the treatment of choice with high success rate. Close clinical and radiological follow-up for these tumors after surgery should be made.

Microtrapdoor Flap Technique for Treatment of Glottic Laryngeal Stenosis: Experience With 34 Cases.

OBJECTIVES: Laryngeal stenosis is the most challenging disorder for the laryngologist to treat. Microtrapdoor flap technique was described in 1980s; however, it has not been popular since then. The reason may be the difficulty of the technique. In this study, we will report our experience with microtrapdoor flap technique to treat glottic stenosis of 34 patients. STUDY DESIGN: Retrospective case series of a tertiary referral center. METHODS: Twelve male and 22 female patients make up our study group. All patients, but one, had pure glottic stenosis. The other patient had combined supraglottic and glottic stenosis. Unilateral or bilateral microtrapdoor technique was applied to all patients. The patients are required to have at least 1 year postoperative follow-up. RESULTS: The etiology of glottic stenosis includes 19 cases due to failed surgery for bilateral vocal fold paralysis; seven cases due to microlaryngoscopy (three laryngeal papilloma, one leukoplakia excision, one glottic cancer excision, one foreign body extraction, one biopsy from interarytenoid region); four cases due to prolonged intubation; one case due to laryngeal fracture, one case due to vertical laryngectomy, one case due to smoke inhalation (burn), and one case congenital or idiopathic. Seventeen patients had tracheotomy. All seventeen of them were decannulated 2 months postoperatively. Thirty-three patients (97%) were dyspnea free on exertion 1 year postoperatively. One patient developed restenosis and dyspnea 1 year after treatment; she needs retreatment. CONCLUSIONS: Microtrapdoor flap technique is a successful surgical option for treatment of short-segment laryngeal stenosis.

Botulinum Toxin A for Treatment of Contact Granuloma.

OBJECTIVES: Contact granuloma has been associated with voice abuse, laryngopharyngeal reflux, and habitual throat clearing. It has a high propensity for persistence and recurrence. Treatment options included voice therapy and antireflux measures. Surgical excision has been considered in patients who do not respond to medical management. In this research, we aimed to present our experience with botulinum toxin injection only. STUDYDESIGN: Retrospective case series of a tertiary referral center. METHODS: Our series consisted of 22 patients, who underwent botulinum toxin injection only as an office procedure to bilateral thyroarytenoid and lateral cricoarytenoid muscles in 2 × 1.25 to 2 × 2.5 U. No other treatment was applied. The cases were followed up for at least 6 months ranging between 6 and 100 months with a mean of 28. RESULTS: Seventeen cases (77%) were cured of their granuloma. Eleven of the cured cases had grade 2, four cases had grade 1, and two patients had grade 3 granuloma. CONCLUSIONS: Botulinum toxin A injection only is an efficient treatment modality in contact granuloma, especially for grade 1, 2, and 3 cases, and it can be used as a first-line treatment.