Pleural mesothelioma: When echo-endoscopy (EUS-B-FNA) leads to diagnosis in a minimally invasive way.

Malignant pleural mesothelioma (MPM) is an asbestos-related and locally invasive tumor with poor prognosis. The acquisition of histological material is mandatory in order to establish a diagnosis. In this situation, the sampling of tissue is generally performed via a thoracoscopic pleural biopsy, either medically or surgically. The use of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) or transesophageal fine needle aspiration with an EBUS scope (EUS-B-FNA) of pleural lesions have only rarely been reported due to the theoretical limitations of tissue acquisition in such cases. We herein report a rare case of MPM successfully diagnosed via EUS-B-FNA in a 49-year-old woman with an unusual presentation characterized by solid thickening in the right mediastinal pleura.