<unk> 's (semilunar)<unk>  is an anatomic<unk>  of some clinical importance. It is a crescent-shaped<unk> , encompassed by the lower edge of the left lung, the anterior border of the spleen, the left costal margin and the inferior margin of the left lobe of the liver. Thus, its surface markings are respectively the left sixth rib superiorly, the left mid axillary line laterally, and the left costal margin inferiorly.
Traube's space
Breslow's depth
Port 
Pulmonary bay
Injection port
Pocock boundary
Boracic lint
Arlt's line