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Year : 2017  |  Volume : 7  |  Issue : 2  |  Page : 29-32

Narrow-band imaging in chronic granulomatous laryngeal tuberculosis

1 Sushrut Institute of Plastic Surgery and Super-Specialty Hospital, Lucknow, Uttar Pradesh, India
2 Department of ENT, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
3 Professor of Otorhinolaryngology at University of Genova's Medical and Postgraduate Schools and the Director of Otorhinolaryngology at Genova's San Martino University Hospital, Italy

Correspondence Address:
Dr. Ashish Chandra Agarwal
Department of ENT, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow - 226 010, Uttar Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jlv.JLV_4_18

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Context: The study analyzes the vascular pattern on narrow-band imaging (NBI) in laryngeal tuberculosis (TB) and its differentiation from premalignant and malignant lesions. Objective: NBI is an optical image enhancement technology using light of 415 nm and 540 nm wavelength. These have different depths of penetration and highlight the mucosa and submucosa. NBI has a proven role in the detection of premalignant and malignant lesions. This study analyzes the vascular pattern on NBI in laryngeal TB and its differentiation from premalignant and malignant lesions. Materials and Methods: A prospective study was done at a tertiary care center on patients presenting with hoarseness, breathing, or swallowing difficulty. An endoscopic examination of the larynx was done, and biopsy was taken on suspicion of a neoplastic lesion. A diagnosis of TB was made in nine patients. These patients were included in the study. NBI examination of the larynx was done to analyze the vascular pattern on the vocal folds. The margin and center of the lesion were analyzed in detail. Results: Two patients had primary laryngeal lesions and seven had laryngeal and lung involvement. History and clinical examination, supportive investigations, and NBI helped in the diagnosis. The intrapapillary capillary loop pattern seen in early premalignant or malignant lesion was not observed in any of the cases on NBI. Conclusion: NBI is not confined to the diagnosis of premalignant or malignant lesions. It is equally useful in ruling out malignancy in suspicious lesions on white-light endoscopy. The latter should be carefully evaluated before transoral surgery.

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