Effects of VDR and CYP24A1 gene polymorphisms on the outcome of supraglottic larynx cancer.

OBJECTIVE: Vitamin D has been demonstrated to play a protective role in carcinogenesis. Polymorphisms of the vitamin D receptor (VDR) genes and 24-α-hydroxylase (encoded by CYP24A1) may affect the outcome of some cancers. This study examines the effects of the VDR gene and CYP24A1 single nucleotide polymorphisms on the outcome of supraglottic larynx cancer. PATIENTS AND METHODS: Patients diagnosed with supraglottic larynx cancer between 2017 and 2022 were enrolled. Single nucleotide polymorphisms of the VDR gene (rs2228570, rs731236, rs7975232, rs11574113, rs11168267 and rs11168266) and CYP24A1 gene (rs4809960, rs6022999, rs6068816, rs2259735 and rs2296241) were investigated. All patients were followed up for any evidence of local recurrence, regional recurrence, distant metastasis, and second primary tumor development. Cox regression analysis was performed to evaluate the prognostic value of single-nucleotide polymorphisms (SNPs). Kaplan-Meier method was used for survival analysis. RESULTS: 87 patients were included. The mean follow-up time was 45.02±24.47 months. Cox regression analysis for locoregional recurrence revealed that the hazard ratio of rs731236 GG was 2.098 (95% CI, range: 1.047-4.202, p=0.037). Locoregional recurrence for rs731236 AA, AG, and GG were 38.6%, 23.1%, and 53.3%, respectively. In the presence of rs731236 GG polymorphism, disease-specific survival was significantly shorter (47.63±7.48 months, p=0.015), and disease-free survival (45.71±6.3 months) was significantly shorter (p=0.040). Rates of metastases and second primary tumors were not significantly different between SNPs. CONCLUSIONS: This study has demonstrated the possible effects of VDR rs731236 SNP on the locoregional recurrence and prognosis of supraglottic larynx cancer.

Complications after cochlear implantation in adult patients: a retrospective study.

OBJECTIVE: To examine the complication rate in adult patients during and after cochlear implantation. METHODS: A retrospective chart review was conducted of patients who had undergone cochlear implantation at a tertiary referral centre between 2009 and 2018. All complications and their treatments were categorised as either minor or major, as well as intra- or post-operative. RESULTS: The records of 392 patients with 395 implants were reviewed. The mean follow-up period was 89 ± 65.5 months (range, 6-408 months). The mean age of patients was 46 ± 15.2 years (range, 19-84 years). Sixty-two patients (16 per cent) had minor complications and 31 (8 per cent) had major complications. CONCLUSION: Although cochlear implantation has the potential for significant intra- and post-operative complications, the actual complication rate is relatively low, and it can therefore be considered a safe procedure.

Bilateral cochlear implantation in children: simultaneously or in consecutive sessions?

OBJECTIVE: This study aimed to evaluate and compare cases of simultaneous and consecutive bilateral cochlear implantation from the perspective of the duration of anaesthesia, surgical complications and hospitalisation. METHOD: Fifty patients with simultaneous bilateral cochlear implantation (group 1) and 47 patients with consecutive bilateral cochlear implantation (group 2) were included in this study. The two groups were compared in terms of the duration of anaesthesia, the duration of surgery, radiological findings, the complications and the post-operative hospitalisation time. RESULTS: Group 1 had a significantly shorter operation time than group 2 (p < 0.01). The mean total operation time was 189 minutes in group 1. In group 2, the mean operation times for the first and second surgery were 134 minutes and 136 minutes, respectively, and the total operation time for both surgical procedures in group 2 was 270 minutes. The duration of post-operative hospitalisation of the patients in group 1 was significantly shorter than the total post-operative hospitalisation after both operations for the patients in group 2 (p < 0.01). CONCLUSION: In conclusion, if there is no anatomical problem that may lead to a prolonged operation time or any risk regarding anaesthesia, simultaneous bilateral cochlear implantation can be performed safely.