A Case of Mediastinal Tuberculous Lymphadenitis Mimicking a Submucosal Tunor of the Esophagus

Esophageal involvement in tuberculosis is rare, and the clinical presentation may mimic an esophageal submucosal tumor. A 30-year-old woman presented with dysphagia for 1 month. At esophagoscopy, a 3-cm subepithelial mass with normal covering mucosa was found 28~25 cm from the upper incisors. We diagnosed the lesion as a submucosal tumor of the esophagus and performed endoscopic ultrasonography 1 week after the first examination. The second endoscopy showed a large, linear ulceration on the same subepithelial mass. The histologic examination obtained following an endoscopic biopsy revealed chronic granulomatous inflammation, and a molecular nested PCR study for Mycobacterium tuberculosis was positive. The final diagnosis was mediastinal tuberculous lymphadenitis with invasion into the esophagus. We suggest the use of molecular biology techniques when there is a strong clinical suspicion of tuberculosis and difficulty in arriving at a definite diagnosis. (Korean J Med 2011;80:328-332)