Abstract
About 150 cases of supratentorial glioma were treated during the past 17 years. Based on functional status, 15 were judged to be cases of silent glioma (synonymous with Norman's inactive glioma). They were silent for from 5 to 17 years, for an average of 8.5 years.
Histologically, they included: Astrocytoma Grade I, 6 cases; Astrocytoma Grade II, 7 cases; Astrocytoma Grade III, 1 case, and Ependymoma, 1 case. Most of these silent gliomas were fibrillary or gemistocytic astrocytoma. Cystic formation was seen in 10 of the 15 tumors, and calcification in 7 of the 15 (46%). In other words, there were only 2 of 15 cases of silent glioma without either cystic formation or calcification.
