True cystic meningiomas are unusual. A metaplastic cystic meningioma is presented with a discussion of computerized tomography and pathological correlation.
Meningioma*

Hemangiopericycic maningioma is clinically and pathologically similar to peripheral Hemangiopericytoma and now tends to be terned as hemangiopericytoma of central nervous system. The authors studied 3 cases of hemangiopericytic meningioma obtained from 3 patients, 1 case of meningotheliomatous meningioma, angioblastic meningioma and transitional meningioma, and 2 cases of peripheral hemangiopericytoma, which had operated from November 1988 to May 1989 at the department of neurosurgery, Pusan Inje University Hospital. The authors analysed and compared the immunohistochemical finding and light microscopic apearance. The results obtained were summarized as follows; 1) Classic maningioma (meningotheliomatous meningioma, transitional meningioma and angioblastic meningioma) shows reactivity to both EMA and vimentin. 2) Hemangiopercicytic meningioma and peripheral hemangiopericytoma are reactive only to vimentin, so the two tumors are suggested as same type of tumor. 3) One of 3 cases of hemangiopericytic meningioma shows whorling and interlacing bundles of spindle cells, the peculiar light microscopic features of transitional meningioma, suggesting transitional or mixed form of hemangiopericytic meningioma and transitional meningioma.
Meningioma

Hemangiopericycic maningioma is clinically and pathologically similar to peripheral Hemangiopericytoma and now tends to be terned as hemangiopericytoma of central nervous system. The authors studied 3 cases of hemangiopericytic meningioma obtained from 3 patients, 1 case of meningotheliomatous meningioma, angioblastic meningioma and transitional meningioma, and 2 cases of peripheral hemangiopericytoma, which had operated from November 1988 to May 1989 at the department of neurosurgery, Pusan Inje University Hospital. The authors analysed and compared the immunohistochemical finding and light microscopic apearance. The results obtained were summarized as follows; 1) Classic maningioma (meningotheliomatous meningioma, transitional meningioma and angioblastic meningioma) shows reactivity to both EMA and vimentin. 2) Hemangiopercicytic meningioma and peripheral hemangiopericytoma are reactive only to vimentin, so the two tumors are suggested as same type of tumor. 3) One of 3 cases of hemangiopericytic meningioma shows whorling and interlacing bundles of spindle cells, the peculiar light microscopic features of transitional meningioma, suggesting transitional or mixed form of hemangiopericytic meningioma and transitional meningioma.
Meningioma

A case of lipomatous meningioma is described. On pre-enhanced CT study the lesion was radioluscent but after enhancement almost half of the lesion was strongly enhanced and the other half was still radioluscent. A review of the literatures showed few similar reported cases.
Meningioma*

By carefully examining the above paper, we found that there are many same materials, expressions, and objects between this paper and a previously published paper on another journal (Park SH, Hwang SK, Park Ym: Intramedullary clear cell meningioma, Acta Neurochir (Wien) 148:463-466, 2006). Under these circumstances, the editorial committee concluded to retract this paper as soon as possible. We deeply apologize to the readers for any inconvenience caused by this retraction.
Meningioma*

No abstract available.
Meningioma*

No abstract available.
Meningioma*

The meningioma constitutes the large proportion of the intracranial tumor, but extracranial involvement of meningioma is known to be very rare. The authors experienced a case of meningioma involving the right frontal and ethmoidal sinus, which did not present any clinical or radiological evidences of intracranial involvement.
Meningioma*

Meningioma*

No abstract available.
Meningioma*