[Reactive osseous changes in intracranial types of meningioma (author's transl)].

Reactive osseous changes are so characteristic of meningiomas that diagnosis of meningioma is not infrequently possible by merely x-raying the cranium. The x-ray film shows flat or bed-like growing intracranial types (meningioma en plaque) which occupy little space or none at all, where the skeletal changes are most prominent. This type of meningioma escapes contrast medium diagnosis and is positive only in the conventional x-ray of the cranium or - in the state of beginning spread - in the tomogram.