Diagnostic accuracy of lugol chromoendoscopy in the oesophagus in patients with head and neck cancer

Carvalho, R.; Areia, M.; Brito, D.; Saraiva, S.; Alves, S.; Cadime, A.T.

Revista Española de Enfermedades Digestivas 105(2): 79-83

2013


DOI: 10.4321/s1130-01082013000200004
Accession: 068501511

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Abstract
patients with head and neck squamous cell malignancies have a higher risk of oesophageal squamous cell carcinomas. Lugol chromoendoscopy in oesophagus is a simple technique with a high diagnostic yield in premalignant lesions. The objective was to analyze its diagnostic accuracy in dysplasia and carcinoma of the oesophagus in high-risk patients. prospective study from April/2008 to January/2012 using lugol chromoendoscopy with biopsies of suspicious lugol voiding areas > or = 5 mm. Patients with head and neck malignancies were included, except the ones with iodine allergy, oesophageal varices and contra-indications to standard endoscopy. The reference method was histopathology. 89 patients were enrolled (mean age 62.8 + or - 13.3 years, 87 % men). Primary tumour was located in oropharynx in 37 (41.6 %), in oral cavity in 29 (32.6 %) and in the larynx in 23 (25.8 %) cases. 40.4 % patients had previous treatments and 87 % reported alcohol or tobacco addition. All exams performed without anaesthesia or complications. Nine suspicious lugol voiding areas were observed and biopsied. Histopathological analysis revealed high-grade dysplasia in 2 (2.2 %) and inflammation or normal findings in the others. The sensitivity and specificity for detecting high-grade dysplasia were 100 % and 92 % (95 % CI: 87-97), respectively. Diagnostic accuracy of the test was 92 % (95 % CI: 86-98). lugol staining of the oesophagus during endoscopy seems to be a feasible, safe and justified procedure in high-risk populationas it enhances the detection of premalignant lesions.