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Dive into the research topics where Serdar Akyildiz is active.

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Featured researches published by Serdar Akyildiz.


International Journal of Pediatric Otorhinolaryngology | 2009

Juvenile nasopharyngeal angiofibroma: analysis of 42 cases and important aspects of endoscopic approach.

Raşit Midilli; Bulent Karci; Serdar Akyildiz

OBJECTIVE To determine the general characteristics of 42 patients who were operated for juvenile nasopharyngeal angiofibroma (JNA); and to determine the important aspects and the advantages of endoscopic transnasal approach over other techniques. METHODS Forty-two patients with JNA, 12 of whom were operated with endoscopic transnasal approach at a tertiary care center between March 1987 and February 2008 were evaluated retrospectively. The general characteristics of the patients, presenting signs and symptoms, the surgical approach performed, tumor stage, whether preoperative embolization was performed and rates of recurrence were studied. Patients who underwent surgery with endoscopic transnasal approach were compared to others who underwent surgery with different techniques. RESULTS One patient was female and the remaining 41 patients were male. Twelve patients underwent endoscopic removal of the tumor. Lateral rhinotomy was used for 10 patients, degloving approach for 7 patients, transpalatal approach for 6 patients, combined approach for another 6 patients and finally midfacial splitting for 1 patient. Seventeen percent of the patients had referred with recurrent diseases. According to staging system of Radkowski, about half of the patients belonged to stage IIA or IIC. The mean age was 16 and the most common presenting symptom was nasal obstruction. Preoperative embolization rate was 59.5% while recurrence rate in the postoperative period was 17%. In non-endoscopic approaches, the tumor contiguity and operative plan were determined via radiological data. In operations performed with endoscopic transnasal approach in patients with JNA, the radiological data as well as a detailed endoscopic tumor examination were utilized and it was observed that tumor invaded the middle turbinate in 67% and both the septum and middle turbinate in 42% of the patients. While preoperative embolization was performed only in larger tumors before 1998, it was recruited in all subjects after 1998. Preoperative and postoperative hemorrhage were less, and durations of packing and hospitalization were shorter in patients operated with endoscopic approach plus preoperative embolization. CONCLUSION Endoscopic transnasal approach has advantages of no non-cosmetic sequela, less hemorrhage and no disruption in facial skeleton. Besides, this method allows better visualization of tumor contiguity and enables dissection and ligature of vascular structures in JNA surgery. The rate of tumors associated with middle turbinate and septum is greater than that is assumed in patients with JNA. Starting the tumor excision with partial resection of the middle turbinate and subperiostal dissection of the septum and anterior sphenoidal wall, and avoiding direct contact with the tumor might decrease the amount of bleeding.


Archives of Otolaryngology-head & Neck Surgery | 2008

A Multivariate Analysis of Objective Voice Changes After Thyroidectomy Without Laryngeal Nerve Injury

Serdar Akyildiz; Fatih Ogut; Mahir Akyildiz; Erkan Zeki Engin

OBJECTIVE To evaluate the impact of thyroidectomy and the possible effects of factors such as patient sex, operation type, and surgeon experience on objective voice parameters of patients undergoing thyroidectomy without laryngeal nerve injury. DESIGN Prospective study. SETTING University hospital. PATIENTS Thirty-six patients undergoing primary thyroidectomy because of thyroid disease. MAIN OUTCOME MEASURES The effect of thyroidectomy on voice was examined by recording the voices of the patients before and 1 week after thyroidectomy. The Multi-Dimensional Voice Program was used for capturing and analyzing the voice samples. RESULTS On postoperative examination of objective voice changes, thyroidectomy had no multivariate effect on the combination of voice parameters. Patient sex, type of surgery, and surgeon experience had no effect on the combination of voice parameters before and after thyroidectomy. Regardless of within-patient factors (type of surgery, patient sex, and surgeon experience), 4 acoustic parameters (highest fundamental frequency, standard deviation of average fundamental frequency, phonatory average fundamental frequency range in semitones, and degree of subharmonics) significantly decreased after thyroidectomy (P < .05). Although they tended to be worse, none of the acoustic parameters showed significant changes in male patients. However, significant changes in some of the acoustic parameters of female patients were observed. Highest fundamental frequency, standard deviation of average fundamental frequency, phonatory average fundamental frequency range in semitones, absolute jitter, relative average perturbation, pitch perturbation quotient, shimmer in decibels, percentage of shimmer, amplitude perturbation quotient, noise to harmonic ratio, and degree of subharmonics values were all lower in female patients after thyroidectomy (P < .05). CONCLUSIONS Voice changes may occur after thyroidectomy without any evident laryngeal injury, and deterioration and amelioration of acoustic parameters can be observed to occur differently among male and female patients. Preoperative and postoperative objective voice analyses may be helpful in documenting voice changes.


American Journal of Rhinology & Allergy | 2009

Anatomic variations of sphenopalatine artery and minimally invasive surgical cauterization procedure.

Raşit Midilli; Mustafa Orhan; Canan Saylam; Serdar Akyildiz; Sercan Gode; Bulent Karci

Background Sphenopalatine artery (SPA) ligation or cauterization stands to be one of the most common management options of refractory epistaxis. Ramification pattern of SPA as it passes through sphenopalatine foramen (SPF) has not been clearly established. The aim of this study is to investigate situations in which middle meatal approach may fail due to anatomic variations of SPA and to define a minimally invasive surgical cauterization procedure. Anatomic variations of SPA were determined by microdissection of 20 adult sagittally cross-sectioned head specimens. Methods Branching characteristics of SPA and its anatomic relations were evaluated and anatomic variations were noted. Results SPA was generally (80%) forming branches within SPF before entering into the nasal cavity. In 20% of the specimens, SPF was located superior to the horizontal lamella of the middle turbinate, and accessory foramen was present in 10%. In 10% of the cases, the posterior lateral nasal branch was situated as two branches in a deep sulcus in the middle meatus. Conclusion The ramification pattern of SPA can not be fully exposed without resection of the posterior part of the middle turbinate via the middle meatal approach. Two-step procedures are advocated in reducing failure rates. Previously defined two-step procedures are relatively invasive. A less invasive procedure is defined based on the variations of SPA and SPF.


Archives of Facial Plastic Surgery | 2009

Rhinobase: A Comprehensive Database, Facial Analysis, and Picture-Archiving Software for Rhinoplasty

Fazil Apaydin; Serdar Akyildiz; David A. Hecht; Dean M. Toriumi

Correspondence: Dr Hamilton, Department of Otolaryngology–Head and Neck Surgery, Division of Facial Plastic and Reconstructive Surgery, University of Iowa Hospitals and Clinics, 200 Hawkins Dr, Iowa City, IA 52242 ([email protected]). Financial Disclosure: None reported. Additional Contributions: Norman Koren, MA, of Imatest provided his insights on camera testing and image analysis, and M. Bridget Zimmerman, PhD, provided statistical consultation.


Dermatologic Surgery | 2015

Long-term Follow-up of Positive Surgical Margins in Basal Cell Carcinoma of the Face.

Aykut Bozan; Sercan Gode; Isa Kaya; Banu Yaman; Mustafa Uslu; Serdar Akyildiz; Fazil Apaydin; Can Ceylan; Gunseli Ozturk

BACKGROUND Basal cell carcinoma (BCC) in central facial locations and tumors with positive margins are at a higher risk of recurrence. The most effective treatment is total excision, which includes an adequate pathological margin. OBJECTIVE To evaluate the outcome of the patients who underwent surgery for BCCs of the head and neck and of those who had positive surgical margins where Mohs surgery is not available. METHODS This study was conducted at Ege University Medical School between 2004 and 2014. One hundred thirty patients with 154 BCC who underwent surgical excision were included. In the histopathologic report, the existence of positive margin, BCC subtype, localization of the tumor, and distance of margins to the tumor were evaluated. RESULTS Twenty-three lesions (14.9%) of 22 patients revealed positive surgical margins. Six patients (26.1%) had recurrences on the surgical site. The BCC subtypes of recurrent patients were reported to be multifocal superficial in 2 (33.3%), infiltrative (16.7%) in 1, and micronodular (50%) in 3. CONCLUSION Patients with superficial multifocal or micronodular tumors should undergo reoperation because of high recurrence rates.


International Journal of Otolaryngology | 2009

Solitary Amyloid Tumor of the Tongue Base

Serdar Akyildiz; B. Doganavsargil; S. Göde; A. Veral

The purpose of this article is to present a rare case of localized, solitary amyloid tumor of tongue base and emphasize some of the characteristic features of challenging clinical and histopathologic diagnosis. In this paper, we focused on the clinical and pathological specifications of this rare tumor, so any unnecessary examinations or measures may be spared. Negative staining of amyloid material with AAC and osseous metaplasia noted in the histopathologic examination may not be thought as definite criteria for localized amyloidosis, but a supporter of localized, solitary amyloid tumor diagnosis.The purpose of this article is to present a rare case of localized, solitary amyloid tumor of tongue base and emphasize some of the characteristic features of challenging clinical and histopathologic diagnosis. In this paper, we focused on the clinical and pathological specifications of this rare tumor, so any unnecessary examinations or measures may be spared. Negative staining of amyloid material with AAC and osseous metaplasia noted in the histopathologic examination may not be thought as definite criteria for localized amyloidosis, but a supporter of localized, solitary amyloid tumor diagnosis.


Operations Research Letters | 2012

Impact of Laryngeal Findings on Acoustic Parameters of Patients with Laryngopharyngeal Reflux

Serdar Akyildiz; Fatih Ogut; Ahmet Varis; Tayfun Kirazli; Serhat Bor

Objectives: To identify the effects of laryngopharyngeal reflux (LPR)-related laryngeal findings on objective voice parameters. Methods: Two hundred and thirty patients clinically diagnosed as having LPR and 48 healthy controls were included. The reflux finding score was determined for each subject via videolaryngoscopy. The acoustic parameters evaluated were jitter, shimmer, noise-to-harmonic ratio and Voice Turbulence Index (VTI). Results: Shimmer and VTI showed statistically significant differences between the LPR and control groups among males (p < 0.05). For females, all of the 4 acoustic voice parameters were significantly different between the two groups (p < 0.05). Erythema/hyperemia was found to affect the highest number of voice parameters. VTI was found to be affected by the highest number of laryngeal findings. Conclusion: Objective voice changes were documented in LPR patients, with VTI being the most affected parameter, and therefore it should be considered in the acoustic analysis of patients with LPR in addition to the conventional parameters. With hyperemia in the first rank, ventricular obliteration, pseudosulcus and vocal fold edema are found to have an impact on voice, suggesting that these should be concentrated on in the diagnosis and follow-up of LPR patients with voice disorders.


Journal of Neurogastroenterology and Motility | 2017

The Role of Microaspiration in the Pathogenesis of Gastroesophageal Reflux-related Chronic Cough.

Pelin Özdemir; Münevver Erdinç; Rukiye Vardar; Ali Veral; Serdar Akyildiz; Özer Özdemir; Serhat Bor

Background/Aims Gastroesophageal reflux disease (GERD) is one of the main causes of chronic cough. We evaluated the role of microaspiration in the pathogenesis of reflux-related cough by determining the amount of lipid-laden macrophages (LLMs) in bronchoalveolar lavage (BAL) specimens. Methods A total of 161 cases of chronic cough were evaluated, and 36 patients (average age 48.2 years) were recruited for this single center prospective study. Patients with a history of smoking, angiotensin converting enzyme inhibitor usage, any abnormality on pulmonary function tests, abnormal chest X-rays, occupational or environmental exposures, or upper airway cough syndrome were excluded. GERD was evaluated by 24-hour esophageal impedance-pH monitoring. BAL specimens for LLM determination were obtained from 34 patients by flexible bronchoscopy. Results Patients with pathological intra-esophageal reflux according to multichannel intraluminal impedance and pH monitoring had higher LLM positivity in BAL specimens than patients without pathological reflux (8/14 in reflux positive group vs 1/22 in reflux negative group; P = 0.004). The BAL cell distribution was not different between the 2 groups (P = 0.574 for macrophages, P = 0.348 for lymphocytes, P = 0.873 for neutrophils and P = 0.450 for eosinophils). Conclusions Our results confirm the role of the microaspiration of refluxate in the pathogenetic mechanism of chronic cough. While bronchoscopy is indicated in patients with chronic cough, in addition to the routine airway evaluation, BAL and LLM detection should be performed. LLM can be used to diagnose aspiration in reflux-related chronic cough. Future studies are needed to evaluate the response to anti-reflux medications or surgery in patients with LLM positivity.


Operations Research Letters | 2016

Post-Surgical and Oncologic Outcomes of Supracricoid Partial Laryngectomy: A Single-Institution Report of Ninety Cases

Kerem Ozturk; Serdar Akyildiz; Sercan Gode; Goksel Turhal; Tayfun Kirazli; Abdulhalim Aysel; Ümit Uluöz

Objective: The aim of this study was to report the post-surgical and oncologic outcomes of patients who underwent supracricoid partial laryngectomy (SCPL). Methods: 90 patients who underwent SCPL between 1994 and 2014 were reviewed. 45 patients underwent cricohyoidopexy (CHP) and 45 patients cricohyoidoepiglottopexy (CHEP). Median nasogastric (NG) tube removal time, decannulation time, overall survival, disease-free survival and local control rates were calculated. The effect of the type of surgery on functional and oncologic outcomes were assessed. Results: Median NG tube removal time was 16.5 days (IQR = 10) and 14 days (IQR = 9) in CHP and CHEP patients, respectively (p > 0.05). Median decannulation time was 30 days (IQR = 26) and 19 days (IQR = 15) in CHP and CHEP patients, respectively (p < 0.05). Resection of one arytenoid significantly increased NG tube removal time. Median follow-up time was 55 months. There were 15 oncologic failures and the median time interval for tumor recurrence was 9 months. Five-year overall survival rate was 80.4%. The 3- and 5-year disease-free specific survival rates were 81.7 and 76.7%, respectively. Conclusions: Given the more extensive surgery applied for CHP, functional outcomes were better in patients with CHEP. Resection of an arytenoid had a negative outcome on swallowing.


Turk Otolarengoloji Arsivi/Turkish Archives of Otolaryngology | 2015

The Value of Sentinel Lymph Node Biopsy in Oral Cavity Cancers

Isa Kaya; Sercan Gode; Kerem Ozturk; Goksel Turhal; Araz Aliyev; Serdar Akyildiz; Ülkem Yararbaş Duygun; Ümit Uluöz; Atilla Yavuzer

Objective The aim of this study was to establish the effectiveness of sentinel lymph node biopsy in the detection of metastasis in N0 necks of T1-T2 early-stage oral cavity cancers. Materials and Methods Twenty neck dissections were performed in 18 patients diagnosed with T1 and T2 oral cavity cancer, with an indication for elective neck dissection between November 2007 and January 2011. The male to female ratio was 12:8, with a mean age of 54.5 years (range 28-76). Eight of the dissections were performed for lower lip cancer, 7 for tongue cancer, and 5 for floor of the mouth cancer. Sentinel lymph node biopsy was used to detect metastatic lymph nodes. Tc99m radionuclide injection was administered to the periphery of the tumor 24 h before the operation, and a lymphoscintigraphy image was obtained 30 min after the injection. Sentinel lymph nodes were localized and excised on the day of surgery using static lymphoscintigraphy images and a gamma probe. Sentinel lymph nodes were sent for a frozen section examination, and either a selective or a comprehensive neck dissection was performed for each neck according to the results. Results After the final histopathological examination of the specimens, the negative predictive value, the positive predictive value, the accuracy of the sentinel lymph node biopsy, and frozen section accuracy were found to be 100%. Conclusion Sentinel lymph node biopsy was found to be an efficient method in the pathological staging and management of the N0 neck in early T-stage oral cavity cancers.

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