Entrapment of the temporal horn secondary to postoperative gamma-knife radiosurgery in intraventricular meningioma: A case report

Abstract

BACKGROUNDEntrapment of the temporal horn (ETH) is a rare pathologic condition. It is a kind of focal hydrocephalus caused by obstruction of flow pathway of cerebrospinal fluid. It is caused by various conditions, but ETH secondary to postoperative gamma-knife radiosurgery (GKS) is extremely rare.CASE SUMMARYA 52-year old previously healthy woman underwent resection of a large intraventricular meningioma. A small fragment of residual tumor with no obvious enlargement of the temporal horn was observed 3 mo after surgery, and she was referred for GKS. Two months after GKS, she complained of headache and progressive paralysis of the left limb. Magnetic resonance imaging revealed enlargement of the temporal horn. There was a second procedure to resect the residual tumor 8 mo after GKS. After the second procedure, she recovered smoothly. As of the date of this writing, she has remained in good condition.CONCLUSIONThis case reminds us that ETH should be considered in the treatment of intraventricular meningiomas, especially before GKS.

Stereotactic radiosurgery for intraventricular meningioma: a systematic review and meta-analysis

“…Search retrieved 309 articles from Medline, Scopus, Embase, and Web of Science. After duplicate removal, 132 papers remained, of which 20 were included after the title/abstract screening stage [ 1 , 8 , 10 , 11 , 15 , 16 , 18 , 20 , 22 , 23 , 29 , 30 , 36 , 37 , 40 – 42 , 45 , 46 , 48 ] and 4 were retrieved from the bibliography review [ 2 , 6 , 33 , 43 ]. In the full-text review, 10 articles did not meet our inclusion criteria [ 8 , 11 , 20 , 29 , 37 , 41 , 42 , 45 , 48 ].…”

“…Among excluded articles, 5 did not apply SRS for the treatment of current IVM [ 16 , 22 , 30 , 36 , 40 ], 2 did not have patients with IVM [ 11 , 18 ], one was conference abstract [ 45 ], one did not have enough data [ 2 ], and one had multiple spinal hemangioblastomas along with IVM and without application of SRS [ 1 ]. Overall, 14 articles matched our inclusion criteria [ 6 , 8 , 10 , 15 , 20 , 23 , 29 , 33 , 37 , 41 – 43 , 46 , 48 ]. Figure 1 shows the PRISMA flow diagram for the screening process of the papers.…”

“…A total 14 studies and 101 tumors were included, which comprise, seven case-series [ 8 , 10 , 20 , 29 , 41 , 43 , 48 ] and seven case reports [ 6 , 15 , 23 , 33 , 37 , 42 , 46 ], and only seven [ 8 , 10 , 20 , 29 , 41 , 43 , 48 ] had enough data with at least 3 patients to be entered into the meta-analysis. If studies, case reports or case series, had sufficient data, they were also included in the individual patient tumor control analysis.…”

“…Using the JBI tool for the quality assessment of case series [ 8 , 10 , 20 , 29 , 41 , 43 , 48 ], 6 out of 7 had high-quality [ 8 , 20 , 29 , 41 , 43 , 48 ], and one had moderate quality [ 10 ]. Among case reports, 6 out of 7 had high-quality [ 6 , 15 , 23 , 37 , 42 , 46 ], and one had low-quality [ 33 ]. The summary report of quality assessments for case-series and case reports is available in Tables 2 and 3 , respectively.…”

Entrapment of the temporal horn: case series and systematic review of literature

“…ETH has been described as a result of various conditions mainly including tumors, infection, and fibrosis after surgery involving the trigone of the ventricle. 1,2,3,4 Congenital and idiopathic forms are also described in current literature. 5,6 The principal factor involved in the pathogenesis is the continuous secretion of cerebrospinal fluid (CSF) by the choroid plexus distal to the obstruction site, resulting in a progressive dilation of the temporal horn with subsequent compression on adjacent anatomical structures.…”