asternal ribs.    From Wordnet, Princeton University. 

The liver, in its healthy state and normal proportions, protrudes for an inch (more or less) below the margins of the right asternal ribs.    From Wordnik.com.  [Surgical Anatomy] Reference

As the sternal ribs degenerate into the "false" asternal or incomplete ribs from before, obliquely backward down to the last dorsal vertebra, so the thoracic space takes form.    From Wordnik.com.  [Surgical Anatomy] Reference

So true is it that all the costal region (the asternal as well as the sternal) is a pulmonary enclosure, that any instrument which pierces intercostal space must wound the lung.    From Wordnik.com.  [Surgical Anatomy] Reference

These latter organs, although occupying abdominal space, rise to a considerable height behind K L, the asternal ribs, a fact which should be borne in mind when percussing the walls of the thorax and abdomen at this region.    From Wordnik.com.  [Surgical Anatomy] Reference

For when an emphysematous lung shall fully occupy the right thoracic side from B to L, then G, the liver, will protrude considerably into the abdomen beneath the right asternal ribs, and yet will not be therefore proof positive that the liver is diseased and abnormally enlarged.    From Wordnik.com.  [Surgical Anatomy] Reference