[Non-calcified line in calcification of the globus pallidus]

In recent years, high resolution X-ray CT has provided detailed information on calcification of the basal ganglia. At this institution, a review of 30 patients with 57 globus pallidus calcifications revealed curvilinear non-calcified lines in 19 calcifications. These were considered to be the medial medullary lamina of the globus pallidus. An attempt was made to classify calcifications of the globus pallidus into calcifications of the medial and lateral segments by the non-calcified line or location of the calcification, and to assess the tendency to calcify of both the medial and lateral segments. The results of this assessment revealed that the lateral segment tended to calcify more than the medial segment.