[Operation of lateral ventricular meningiomas of the trigone].
OBJECTIVE
To summarize the surgical treatment of intraventricular trigonal meningiomas.


METHODS
64 cases of intraventricular trigonal meningiomas were retrospectively analyzed. 40 tumors were located in the left trigone and 24 tumors in the right. Pathological diagnosis included 35 fibrous, 10 mixed, 8 endothelial, 3 transitional, 1 secretion and 1 malignant meningioma. The remaining 6 cases cannot be classified into any type.


RESULTS
The tumors ranged in diameter from 2 cm to 15 cm (median 4.8 cm). Microscopic complete removal was achieved in all cases. Postoperatively, hemiparalysis occurred in 4 cases, aphasia in 14, hemianopia in 2, persistent fever (last more than 7 days) in 30 and focal hydrocephalus in 4. There was no mortality. The incidence of postoperative aphasia was correlated with operational approach (Pearson correlation coefficient = 0.404, P = 0.001), tumor side (Pearson correlation coefficient = 0.012, P = 0.012) and size (Pearson correlation coefficient = 0.284, P = 0.023). Postoperative persistent fever was correlated with size (Pearson correlation coefficient = 0.367, P = 0.003) and resection method (Pearson correlation coefficient = 0.537, P = 0.000). In cases of diameter > or = 4 cm, length of stay was not correlated with ventricular drainage (Pearson correlation coefficient = 0.047, P = 0.748).


CONCLUSIONS
Transcortical parieto-occipital approach and Transcortical temporo-parieto-occipital approaches are applicable for intraventricular trigonal meningiomas. The key points to avoid postoperative complications are to decrease damage to surrounding brain tissue and pollution to ventricles.
Li
Xue-zhen
XZ
Department of Neurosurgery, Beijing Tiantan Hospital, Capital University of Medical Sciences, Beijing 100050, China.
Zhao
Ji-zong
JZ
D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D020547:Lateral Ventricles / Q000601:surgery*; D008297:Male; D008577:Meningeal Neoplasms / Q000601:surgery*; D008579:Meningioma / Q000601:surgery*; D008866:Microsurgery / Q000379:methods; D008875:Middle Aged; D012189:Retrospective Studies