Tissue Sample (IMAGE) University of Alabama at Birmingham Caption Stained human lung tissue from a patient who was on anti-tuberculous therapy and underwent emergency pneumonectomy for massive airway bleeding. A central caseative necrotizing granulomatous lesion is present with a rim of lymphocytes. Within the lesion, black indicates calcification. Credit UAB Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.