Anterior mediastinal mass secondary to histoplasmosis.

Histoplasmosis in the mediastinum is an uncommon diagnosis that presents similarly to other benign and neoplastic conditions encountered in the chest. Here we describe a 36-year-old woman who presented with dyspnea secondary to a large anterior mediastinal mass that was biopsy and culture negative for neoplasm or infection. Video-assisted thoracoscopic surgery biopsy confirmed a large anterior mediastinal mass adherent to the aorta, which contained foci of histoplasmosis species. She is currently undergoing a long postoperative course of itraconozole and an empiric course of oral steroids to prevent development of fibrosing mediastinitis.