PREOPERATIVE EVALUATION OF TUMOR ADHESION TO THE ADJACENT BRAIN TISSUE IN PATIENT WITH MENINGIOMA WITH BSMI METHOD

Abstract Purpose:
To investigate the ability of BSMI, to preoperative
evaluation of tumor adhesion to the adjacent brain tissue in the patient with meningioma and comparing this method to the Width of edema around the tumor, using finding at surgery as the reference standard.
 
Methods:
Thirty Patients with meningioma brain tumor who underwent surgery from Loghman hospital were entered the study between November 2016 and January 2018. The level of edema according to the classification of Ide et al. (1995) compared to the surgical finding Blinded to the results, neurosurgeons made a qualitative assessment  of  tumor  adhesion at the time of resection. The ability of BSMI and level of edema to predict the surgical assessment of adhesion was tested using The Fisher exact test.
 
Results:
BSMI method was performed on patients with meningioma brain tumor, it judged 22 (73.3%) patients as adhesion (+) and 8 (26.66%) patients as adhesion (-). In this case, there was a significance relationship between BSMI judge and surgical findings (p-value<0.0001). The sensitivity, specificity, precision and accuracy was high, at 91.30%, 85.71%, 94.45% and 90%, respectively. Using T2 sequence, of the 30 patients, 13 (43.3%) were judged as adhesion (+) and 17 (56.7%) as adhesion (-) from edema, whereas surgical findings evaluated 23 (76.7%) as adhesion (+) and 7 (23.3%) as adhesion (-). The sensitivity was moderate but the specificity was high, at 52.17% and 85.71%, respectively. Other criteria such as precision and accuracy were 92.31% and 60%, respectively.
 
Conclusions:
BSMI evaluated adhesion of the tumor to the adjacent brain tissue with high-accuracy presurgicaly. This method was more effective than Edema method in evaluating adhesion between meningioma and the brain.