Diagnosis of post-radiotherapy local failures in nasopharyngeal carcinoma: a prospective institutional study.
Year: 2014
Type: article
Study design: Observational Study
Abstract: BACKGROUND: This prospective study was conducted to evaluate and compare the efficacies of nasopharyngoscopy and CT scan in the diagnosis of local failure of external beam radiotherapy (EBRT) for nasopharyngeal carcinoma. METHODS: Total 52 patients of histopathologically proven nasopharyngeal carcinoma treated with external beam radiotherapy (EBRT), were included in this study. For every patient computed tomography (CT), nasopharyngoscopy and nasopharyngeal biopsies were performed 3 months after completion of EBRT. RESULTS: Three months after completion of EBRT, 9 patients (17.3%) had evident disease on histological examination of biopsies. Nasopharyngoscopy showed 77.78% sensitivity, 93.03% specificity, 70% positive predictive value and 95.24% negative predictive value in diagnosing the residual/recurrence of tumor. There was statistically significant agreement between the endoscopic findings and the histological findings (Kappa reliability coefficient=0.562, p<0.01). On the other hand, CT scan showed a 55.56% sensitivity, 39.53% specificity, 16.13% positive predictive value and 80.95% negative predictive value in diagnosing the residual tumor/recurrence. There was no statistically significant agreement between the CT scan findings and the histological findings (Kappa reliability coefficient = 0.038, p>0.05). CONCLUSION: Nasopharyngoscopy should be considered the primary follow-up tool after radiotherapy of nasopharyngeal carcinoma. CT scan should be reserved for patients with histological or any symptomatic indications. Routine postnasal biopsies are not required.
Source: PubMed Central
Authors: Puneet Kumar Bagri, Mukesh Kumar Singhal, Daleep Singh, Akhil Kapoor, Shankar Lal Jakhar, Neeti Sharma, Surender Beniwal, Harvindra Singh Kumar, Ajay Sharma, Megh Raj Bardia
Language: English
Topic: Head and Neck Cancer Studies
Subfield: Otorhinolaryngology
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W95373418