seven histopathologic features were positively correlated with recurrence of meningiomas , including the following : hypervascularity of tumors , hemosiderin deposition , growth of tumor cells in sheets rather than the usual growth patterns of meningiomas , prominent nucleoli , mitotic figures , single-cell and small-group necrosis , nuclear pleomorphism , and overall atypical or malignant tumor grade ( all p less than 0.005 ) .
C0007595
growth of
C0007634
cell