CT findings in partial eventration of the right diaphragm

Elevation of the anterior part of the right diaphragm results in the spurious radiological appearance of a mass at the right lung base. Standard chest views are usually sufficient to show the true nature of the "mass." Occasionally, however, a true mass lesion cannot be entirely excluded, and further studies are then required. Two such cases are described and in both the computed tomographic findings clearly showed the anterior part of the liver to be situated under the elevated diaphragm. This elevation of the anterior part of the liver results in tilting of the organ with the posterior part remaining in its normal position below the nonelevated part of the diaphragm. The anterior and posterior parts of the liver are therefore not shown on the same tomographic planes but are found to lie at different levels.