Sender: Michael Nowicki I am a physician at the University of Mississippi. I am trying to compare the size of polyps (abnormal growth of tissue in the colon) between 2 groups of individuals. The department of pathology gives the size as length X width X depth  how do I calculate the volume? Polyps are nearly ovoid in shape. I appreciate any help you can provide.
Sincerely:
Michael, If it is 'oval' meaning ellipsoid, then the appropriate volume formula is a modification of the volume of a sphere. In the terms you have been given, the volume of a sphere is
where all three measurements
happen to be equal. For the ellisoid (oval) you stretch the 'length'  and that stretches the volume by the same ratio, then the width  and that also stretches the volume by the second ratio.
Walter
