<prompt> Which of the following tumour shows a radiological sign called pneumonias dilatans? NOT RELATED-RADIOLOGYMeningiomasEpendymomasHemangioblastomasMedulloblastomas  <response>: Radiological signs of meningiomas:- Dural-based tumor - Hyperostosis of skull- Pneumosinus dilatans - Dural tail sign- Strong homogenous contrast uptake - Calcification common - Mother-in-law sign 