Dosimetric parameters associated with conductive or sensorineural hearing loss 5 years after intensity-modulated radiation therapy in nasopharyngeal carcinoma

Autor: Gang Yang, Ji Li, Shengzi Wang, Wenjia Zhu, Xinmao Song, Weifang Wang, Haiyan Zhang, Wei Yuan, Yi Zhu, Fu Chen, Hao Ding, Lifen Zou
Rok vydání: 2019
Předmět:
Zdroj: Acta Oto-Laryngologica. 139:263-268
ISSN: 1651-2251
0001-6489
DOI: 10.1080/00016489.2019.1566778
Popis: Most previous studies are separate dosimetric analyses of conductive or sensorineural hearing loss, and they are not conducive to a comprehensive assessment of auditory radiation damage.Our study aimed to evaluate the long-term incidence of sensorineural hearing loss (SNHL) or conductive hearing loss (CHL) in patients with nasopharyngeal carcinoma (NPC) after intensity-modulated radiation therapy (IMRT), and to investigate the relationship between SNHL or CHL and patient factors, treatment-related factors, and radiation dose parameters.Seventy patients (117 ears) with NPC, who were also treated with IMRT in our hospital from 2006 to 2014, were retrospectively analyzed. Radiation doses to the Eustachian tube (ET), middle ear (ME), cochlear (Co), and internal auditory canal (IAC) were assessed. Pure tone audiometry and impedance audiometry were performed before and during the follow-up period. The relationships between low-frequencies (0.5-2 kHz) or high-frequency (4 kHz) SNHL/CHL and radiotherapy dose parameters were analyzed.Of the 117 ears studied, 7.69% had low-frequency SNHL, 35.9% had high-frequency SNHL, 23.93% had low-frequency CHL, and 18.80% had high-frequency CHL. The incidence of high-frequency CHL was higher in the T4 group than in the T (1-3) group (p .05). When IAC DSNHL and CHL remain common ear complications after IMRT for NPC. IAC D
Databáze: OpenAIRE
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