Pseudomesotheliomatous carcinoma of lung adenocarcinoma diagnosed using transesophageal ultrasound-guided bronchoscopic aspiration.

Endoscopic ultrasound with bronchoscope-guided fine-needle aspiration (EUS-B-FNA), a minimally invasive procedure, may be useful for the diagnosis of pseudomesotheliomatous (PMC) carcinoma because a sufficient amount of tissue can be obtained for diagnosis. This is the first report of PMC diagnosed using EUS-B-FNA. Our findings suggest that EUS-B-FNA may reduce the risk of dissemination for PMC.