"Matrioska head". Case report of calcified chronic subdural hematoma.

We report an asymptomatic case of a large calcified chronic subdural hematoma (CCSH). Skull X-ray examination, computer tomography (CT) and magnetic resonance imaging (MRI), showed an adhering calcification extending to the whole cerebral cortex, as if the skull had another concentric skull inside it. These radiological findings recall the famous Russian doll named "Matrioska"; for this reason we defined this case "Matrioska head". The patient was absolutely asymptomatic and we discuss the causes that may give the calcification of chronic subdural hematoma (CSH).