“…Other reported complications are occlusions resulting in cerebral and visceral infarcts [Levisohn et al, 1978;Taboada et al, 1979;Sobata et al, 1988;Woody et al, 1992], aneurysms resulting in haemorrhage [Muhonen et al, 1991;Huffman et al, 1996;Grif®ths et al, 1998;Singh et al, 1998], and arteriovenous ®stula [Murayama et al, 1999]. Convulsions, hemiparesis [Piovesan et al, 1999], and headaches may also be clinical manifestations of NF1 vasculopathy, but the range of clinical manifestations is not well characterised. The frequency of NF1 vasculopathy is unknown.…”