/Liu Yi(刘忆，Neurosurg Dept，Southern Hosp， Southern Med Univ，Guangzhou 510515)…∥Chin J Neurosurg.-2011，27(3).-275～280

ObjectiveTo explore the invasion of different types of meningeoma to their surrounding tissue.MethodsThe specimen from 124 patients with meningeomas，who underwent surgery in Southern Hospital from April 2009 to June 2010 were used to analyze the invasion of different types of meningeomas to their surrounding tissue.All the tumors were resected in the standard of Simposon I.We referred to WHO 2007 edition to indentify the type of pathology.ResultsThe invasion included longitudinal type and transversal type.The invasion in the basal dura mater was commonly seen in the benign meningioma，while the invasion was rarely seen in the bone and brain.As to the non-benign meningioma，invasion was commonly seen in dural mater，bone and brain.Some benign meningioma could invase the peripheral dural mater within the range of 2 cm，while most non-benign meningioma invased the peripheral dural mater beyond the range of 2 cm.ConclusionDifferent types of the 124 cases of meningioma own different characters on the invasion.The frozen pathological examination during the operation and special treatment on the key point of the surrounding tissue may decrease the relapse rate after operation.19 refs，5 figs.