"Benign" metastasizing meningiomas.
نویسندگان
چکیده
Less than one in 1000 meningiomas metastasizes. Although the angioblastic and hemangiopericytic tumors are believed by some authors to metastasize with a greater frequency than the other histologic forms of meningioma, most investigators believe that neither the histologic pattern, local aggressiveness, size, nor location of the tumor can be used accurately to predict which tumors will metastasize. Three new cases are presented, bringing the total reported number of metastasizing meningiomas to 113. If the angioblastic meningiomas and hemangiopericytomas are eliminated from this group, 69 reported cases of "benign" metastasizing meningioma remain.
منابع مشابه
Benign metastasizing meningioma.
Meningiomas represent about one sixth of all primary neoplasms of the central nervous system. They rarely metastasize outside the intracranial compartment. There are no clear criteria to identify the subset of aggressive tumors which recur locally or metastasize. Histological tumor grade is the most important predictor of recurrence or metastases. We report an unusual case of recurrent metastas...
متن کاملMultiple Pulmonary Metastases following Total Removal of a Bilateral Parasagittal Meningioma with Complete Occlusion of the Superior Sagittal Sinus: Report of a Case
Pulmonary metastases of benign meningiomas are extremely rare. The case of a 34-year-old man with bilateral parasagittal meningioma who developed pulmonary metastases is described. The meningioma was an enormous hypervascular tumor with invasion of the superior sagittal sinus. The tumor was resected completely and histologically diagnosed as transitional meningioma. The Ki-67 labeling index was...
متن کاملCorrelation of histopathologic classification with proliferative activity and DNA ploidy in 120 intracranial meningiomas, with special reference to atypical meningioma.
Histologic classification of 120 meningiomas was correlated with their proliferative fraction and DNA ploidy using immunohistochemistry and flow cytometry to differentiate histologically atypical meningiomas from benign ones. Histologically, the 120 meningiomas included 101 benign (43 meningotheliomatous, 40 transitional, 11 fibroblastic, 2 secretory, 2 microcystic, 2 angiomatous, and 1 psammom...
متن کاملDNA Methylation in the Malignant Transformation of Meningiomas
Meningiomas are central nervous system tumors that originate from the meningeal coverings of the brain and spinal cord. Most meningiomas are pathologically benign or atypical, but 3-5% display malignant features. Despite previous studies on benign and atypical meningiomas, the key molecular pathways involved in malignant transformation remain to be determined, as does the extent of epigenetic a...
متن کاملPulmonary benign metastasizing leiomyoma: report of three cases
Benign metastasizing leiomyoma is very rare and usually occurs in women who undergo hysterectomy and myomectomy for uterine leiomyoma. This is a benign spindle-shaped smooth muscle cell tumor pathologically but metastasizes to the extrauterine organs. Lungs are the most common site of metastasis. We observed three cases of pulmonary benign metastasizing leiomyoma.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- AJNR. American journal of neuroradiology
دوره 8 1 شماره
صفحات -
تاریخ انتشار 1987