Erratum to: Neurol Sci DOI 10.1007/s10072-009-0157-0

In two consecutive sentences of the “Discussion” section, due to a typing error, some numbers in square brackets do not correspond to the references listed in the “References” section.

The correct sentences (i.e. reporting the correct numbers in square brackets corresponding to the references) are the following:

“Several hypotheses have been put forward to explain their occurrence, including the effect of vessel wall necrosis and changes related to radiation therapy [39, 40], the ionizing effect of radiation energy generating vascular and connective tissue changes in the stroma [41], or the detection of a radiographically occult cavernoma only after radiotherapy [42]. Nimjee et al. [43] described 76 de novo CCs after radiation treatment”.