• Anthracosis refers to a benign pulmonary pathological finding frequently seen in urban dwellers and smokers caused by low-level, life-time inhalation of inert carbon dust particles. Pathology manifests as long, dark streaks interrupted by dark nodules, representing the migratory path of dust-laden alveolar macrophages along pulmonary lymphatic vessels and lymph nodes. However, in coal workers, a picture of anthracosis can evolve into one of Coal Workers Pneumoconiosis if high-level exposure to carbon dust occurs over a life-time.