Primary Subglottic Laryngeal Tuberculosis Mimicking as Malignancy: A rare case Report

Abstract

Primary Laryngeal Tuberculosis is an uncommon clinical entity. Reported incidence of laryngeal tuberculosis is less than 1%. Secondary laryngeal TB is more common and is presumed to arise from spread of infected secretions from lungs to vocal cords. We report an unusual case of primary laryngeal TB of subglottic region in a 31 year female who presented with persistent throat irritation and hoarseness of voice since two months with mild respiratory discomfort and was diagnosed to have primary subglottic Tuberculosis. We report this case owing to the rarity of disease, sometimes masquerading as malignancy.

Keywords: Granulomatous; Laryngeal tuberculosis; Malignancy; Stridor; Subglottis; Ulceroproliferative.

Fig. 1

1(a) Laryngeal endoscopy showing ulcerative lesion in subglottic region below left true vocal cord. 1 (b) Follow up laryngeal endoscopy shows resolved lesion in subglottic region after 2 months of anti-tuberculous therapy.

Fig. 2

(a, b) A well defined altered signal intensity of showing T1 hypointense and T2/STIR heterogenous of size measuring approx. 10*9*11 mm (AP*TR*CC) seen in left subglottic region, no evidence of diffusion restriction noted