Computed tomography of conglomerate mass in foundry worker with anthracosilicosis, initially suspected of representing a bronchogenic carcinoma

Axial computed tomogram (CT) from a foundry worker with anthracosilicosis, who was status post remote right upper lobe lobectomy. Image taken at the level of the tracheal bifurcation demonstrates a conglomerate mass encasing the left upper lobe bronchus. Biopsy of the left upper lobe mass yielded coal-filled alveolar macrophages.