**1. Introduction**

The recurrence's rate of intracranial meningiomas ranges from 10–32% at 10 years [1–3] .The main risk factors include the WHO grade [4–7], the extent of resection according to Simpson [8–10], the proliferation index Ki67-MIB1 [11–14] and mitotic index [15] and the postoperative adjuvant treatments [1, 16, 17]. Other factors have also been suggested, such as patient age and sex [4, 18], tumor size [19–21], location [22, 23] and morphology [19, 22, 24], brain invasion [10, 14], progesterone receptor (PR) expression [25–27].

Meningiomas may recur with different patterns of growth, from more localized to more extensive and sometimes diffuse forms. This carries several diagnostic and therapeutic implications. However, all published studies consider the overall

recurrences, with no focusing on their topography and extension, which were first discussed only in our recent report [28].
