Butterflied specimen, with extensive hilar nodal enlargement. Coronal section through the lungs, trachea and hila in a patient with sarcoidosis, demonstrating extensive right paratracheal and hilar nodal enlargement (giving rise to the lambda sign).
Picture 1; Picture 2; Picture 3; Picture 4; Picture 5; Picture 6 Author: Image courtesy of Yale Rosen M.D., original files here, modifications: replaced background and made square aspect
