Calcification such as psammoma body is sometimes found especially in spinal cord 
meningioma but ossification of the meningeal tumor was rarely observed. Two 
cases of ossificated spinal cord meningiomas, located extramedullary 
intradurally apart from spinal bone, were clinicopathologically analyzed. The 
patients were 75-year-old female with meningioma at T9-10 level and 60-year-old 
female with one at T6-8 level. With pathological examination, concentration of 
psammoma bodies is not related to the formation of bone tissue. Metaplasia of 
arachnoid cell is seemed to be the origin of the bone structure.