CT diagnosis of focal nodular hyperplasia

The paper analyses the findings of a CT study of 21 lesions of focal nodular hyperplasia in 17 patients. In addition to subjective valuation of the dynamic studies, densitometric measurements on a time basis were carried out (gamma-fit curves) and a density profile was obtained. These tumour-like lesions show typical density changes with rapid enhancement in the arterial phase and rapid fall in density after one or two minutes. Various patterns of the hyperdense lesions (non-homogeneous, those resembling vessels or homogeneous lesions) may be of significance in differential diagnosis. Atypical density patterns were found particularly in foci projecting from the liver. (orig.)