Intraosseous lipoma of the skull: a report of two cases.

Case histories of a 12-year-old boy and a 20-year-old woman with hyperostosis of the frontoparietal bones are presented. Microscopical examination of the lesions showed intraosseous lipoma with hyperostosis of diploë. In both cases, only the prominent part of the tumor was removed for cosmetic reasons. The results were satisfactory, and there was no evidence of recurrence over a period of six years.

Radionuclide angiography in two cases of hepatic actinomycosis.

Primary hepatic actinomycosis is rare, and there have been few reports concerning its nuclear imaging findings. Two cases of actinomycosis, in which hypervascular hepatic masses were observed in the arterial phase of radionuclide angiography are reported. To the authors' knowledge, this finding has not been reported in the literature. In one of the two cases, intense Ga-67 uptake also was noted. Although the preoperative diagnosis based on the findings of nuclear imaging (liver scan, liver flow study, Ga-67 scan), ultrasound, CT, and angiography was hepatoma, hepatic masses in our cases proved to be hepatic actinomycosis. Because hepatic actinomycosis is rare, this disease is neglected often in the differential diagnosis of hepatic mass lesions. It should be included in the gamut of hypervascular hepatic mass lesions.

Concentration and clearance of Tc-99m-pyridoxylidene isoleucine by a hepatoma.

Usually hepatic tumors show focal defects on both Tc-99m-colloid liver and Tc-99m-hepatobiliary imaging. This report involves a rare case in which a hepatoma did not take up Tc-99m-phytate, but concentrated and cleared a Tc-99m-hepatobiliary agent, Tc-99m-pyridoxylidene isoleucine.