Astrocytoma and associated arteriovenous malformation

Surgical strategy in case with co-existence of malignant oligodendroglioma and arteriovenous malformation: A case report

“…Two cases had a good clinical course as the present case [24,28]. As a whole, in 51 cases described the clinical results, 23 cases were good recovery, 18 were moderate disability and 10 cases were dead.…”

“…Concerning the histology of the brain tumors involved in these cases, there were 12 cases of pilocytic astrocytoma [27,40], 10 of astrocytoma [3,6,8,15,29,30,33,35,36], 6 of malignant astrocytoma [13,18,25,34,36], 20 of oligodendroglioma [4,9,10,20,24,27,38], 3 of glioblastoma [7,19,36], 8 of meningioma [10,11,16,17,21,22,26,32], 5 of acoustic tumors [12], and 3 of pleomorphic xanthoastrocytoma [28,31,39]. Other tumors found in association with AVM include hemangioblastoma [5], hemangiopericytoma [22], ganglioneuroma, [23] subependymal giant astrocytomas [29], and craniopharyngioma [14].…”

“…There have been 5 case reports with the separate type [11,20,21,24,28], in which both of the lesions were removed. Two cases had a good clinical course as the present case [24,28].…”

De novo formation of large arteriovenous shunting and a vascular nidus mimicking an arteriovenous malformation within an anaplastic oligodendroglioma: treatment with embolization and resection

“…These reports suggest an association between such lesions and primary brain neoplasms, specifically oligodendrogliomas 4,5,14 and astrocytomas. [6][7][8][9]13,21,23 However, this association is rare and their existence as a distinct entity continues to be debated.…”

“…Their association with brain neoplasms is extremely rare, and data are limited to case reports. [4][5][6][7][8][9][10][11]13,14,[21][22][23] It has been postulated that the hyperangiogenic environment of high-grade tumors induces abnormal arteriovenous connections. 7 It is not known why only a very few brain neoplasms develop large arteriovenous shunts with vascular niduses mimicking true AVMs.…”