"A bubble in the head"

by Moncef BERHOUMA  MD, MSc, FEBNS, Department of Neurosurgery, University Hospital of Lyon – France. Contact: berhouma.moncef@gmail.com
Case Description

 A 43-year-old man without any medical history presented to the outpatient clinic for a 10 days history of headaches with vomiting.  The neurological examination revealed a bilateral papilledema, a slight left hemiparesis and a grasping reflex. The anamnesis of his entourage disclosed recent aboulia and deficit of attention. 

* 1. What is the possible lesional location?