“…Expression of GFAP and S-100 is limited to scattered reactive astrocytes [4,9,15], and a few tumour cells [2,5,11,13]. The tumour cells are negative for NF [2,4,5,9,11,15]. MIB-1 labelling index was < 1% [2], 4% [11], 5.8% [4] and 15% and increased to 30% in the recurrent tumour [9].…”