The costal margin may be used for tissue harvesting of cartilage for use elsewhere in the body, such as to treat
microtia. Different
abdominal organs may be
palpated just below the costal margin, such as the
liver on the right side of the body. The
costal paradox, also known as '''Hoover's sign
and the costal margin paradox''', is a sign where the costal angle decreases upon
inspiration rather than increasing, indicating
chronic obstructive pulmonary disease. == References ==