Hernia of the lung is an uncommon clinical entity. The majority of rep
orted hernias are acquired traumatic thoracic hernias.(1,2) A case of
an acquired spontaneous hernia occurring through an old anterior thora
cotomy scar is presented, We believe pathogenesis of this hernia was t
he result of increased intrathoracic pressure secondary to tracheobron
chomegaly and anterior-posterior collapse of the trachea during expira
tion, The hernia was successfully repaired by a video-assisted thoraci
c surgical (VATS) technique using prolene mesh and a hernia stapler si
milar to the technique used in repair of an inguinal hernia.