"All clear cell meningiomas showed absence of CA-IX expression and loss of nuclear SMARCE1 expression. All microcystic and angiomatous meningiomas showed diffuse CA-IX immunoreactivity and retained nuclear SMARCE1 expression. In other meningioma variants CA-IX was expressed in a hypoxia-restricted pattern and was highly associated with atypical features such as necrosis small cell change and focal clear cell change."xsd:string