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    Assessment of cochlear implant revision surgeries in a cohort of 802 patients
    (NLM (Medline), 2019) Karamert, Recep; Düzlü, Mehmet; Tutar, Hakan; Eravcı, Fakih Cihat; Türkcan, Alper Kutalmış; Zorlu, Mehmet Ekrem; Uğur, Mehmet Birol; Cebeci, Süleyman; Bezgin, Selin Üstün; Cevizci, Raşit; Bayazıt, Yıldırım Ahmet
    Objective: To assess the etiology, demographics, rates and outcomes of revision surgeries, and device survival rates after cochlear implantation. Study Design: Retrospective case review. Setting: Tertiary Otology & Neurotology center. Patients: Cochlear implantees who received revision surgeries after implantation Interventions: Any surgical intervention, performed due to device failure or the major complications of cochlear implantation. Main Outcome Measure: Medical records of the patients who received cochlear implants (CIs) between July 2002 and March 2018 were reviewed retrospectively regarding postoperative complications. Demographic data, device survival rates, and causes of revisions were recorded. Results: Totally, 924 implantations were performed in 802 patients. Eighty one (8.7%) of them underwent 102 revision surgeries. The most common causes of revision surgeries were device failures and flap related problems which were seen in 28 and 18 patients, respectively. Overall CI survival rate was 91.9% in a 10 years period, which remained almost stable after 10 years. Although age was not found to be related with device failure (p = 0.693), device loss rates were significantly higher in adult implantees than children (p = 0.006). Conclusion: Device failure seems the most common cause of revision. The revision surgeries are usually safe and help to resolve the problem although flap problems are the most difficult to treat and may necessitate multiple revision surgeries. The device failure rate may reach to a plateau after 6 years. Overall CI survival rate exceeds 90% in 10 years period, and then remains stable.
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    Canal wall down versus canal wall up surgeries in the treatment of middle ear cholesteatoma
    (The Scientific and Technological Research Council of Turkey (TÜBİTAK), 2019) Karamert, Recep; Eravcı, Fakih Cihat; Cebeci, Süleyman; Düzlü, Mehmet; Zorlu, Mehmet Ekrem; Gülhan, Nagihan; Tutar, Hakan; Uğur, Mehmet Birol; İriz, Ayşe; Bayazıt, Yıldırım Ahmet
    Background/aim: To compare outcomes of canal wall up (CWU) and canal wall down (CWD) techniques in the treatment of middle ear cholesteatoma. Materials and methods: Medical records of 76 patients who had a primary surgery due to middle ear cholesteatoma between July 2015 and November 2017 were reviewed retrospectively. Hearing thresholds, speech discrimination scores (SDS), recurrences, and revision surgeries of CWU and CWD surgeries were compared. Results: Of 76 cholesteatoma cases, 40 (52.6%) had a CWU and 36 (47.4%) had a CWD operation. Postoperatively, the mean air conduction thresholds were significantly better in CWU compared to CWD surgeries (P = 0.016). The presence of the stapes and the type of reconstruction material used did not have a significant effect on auditory success rates (P = 0.342 and P = 0.905, respectively). Auditory success was affected by the status of the middle ear mucosa as well. The recurrence and revision rates did not differ between the surgical techniques (P > 0.05). Conclusion: Status of the middle ear mucosa and external auditory canal are important factors affecting the outcomes in cholesteatoma. Instead of a CWD surgery, a CWU surgery seems applicable in cases of cholesteatoma when the bone in the external auditory canal is not eroded by the disease.
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    The demographics and histopathological features of oral cavity cancers in Turkey
    (2016) Düzlü, Mehmet; Karamert, Recep; Bakkal, Faruk Kadri; Cevizci, Raşit; Tutar, Hakan; Zorlu, Mehmet Ekrem; Dilci, Alper; Eravcı, Fakih Cihat
    Background/aim: This study aimed to examine the demographics and histopathological features of oral cavity cancers (OCCs) managed in our clinic. Materials and methods: Patients who were diagnosed with OCCs in the Gazi University Otorhinolaryngology Department between the years 1993 and 2013 were retrospectively enrolled in the study. Surgical archive charts and pathology records were reviewed in detail regarding the anatomical and histopathological profiles of the tumors, as well as the demographic data of the patients. Results: Out of 230 patients with OCCs, the most common anatomic location and histopathological diagnosis were found to be the oral tongue (41.4%) and squamous cell carcinoma (SCC) (84.3%), respectively. A marked predominance of SCC was observed in all subsites of the oral cavity except the hard palate location. The mean age at presentation was 55.5 ± 13.4 years (±SD). The male:female ratio was found to be 2.2:1. A male predominance was also present in all subsites except the retromolar trigon. Conclusion: OCCs particularly concern the elderly population with a male predominance. The most common location and histopathological type are the oral tongue and SCC, respectively