“…The dura mater has been attached to the bone flap with Dandy's sutures. visual symptoms; displacement of the eyeball, dysfunction of its mobility and diplopia, and danger of blindness, radiologically-confirmed progression of the tumour damaging the bony walls, infiltrating the sinuses, orbits or anterior cranial base, disfiguring facial asymmetry with disturbing aesthetics (Katlan and Griffin, 1961;Karmody, 1969;Hardy and Montgomery, 1976;Natvig and Larsen, 1978;Taptas et al, 1979;Savic and Djevic, 1990;van Manen et al, 1995;Summers et al, 2001). …”