Introduction INI1 2 INI1 INI1 NF2 NF2 INI1 INI1 8 1 Materials and methods Tumour samples and DNA isolation DNA from the AT/RT and the myoepithelioma was isolated from formalin-fixed and paraffin-embedded tumour material, and DNA from the meningioma was isolated from a fresh frozen tumour sample using commercially available kits (Qiagen, Venlo, The Netherlands). SNP analysis http://genome.ucsc.edu/ LOH analysis 3 http://www.gdb.org/ Case report History 2 Histological findings 2 SNP and LOH analysis 1 1 D1S199 1 D2S327 D3S3727 1 D16S3020 D17S1872 1 2 D22S430 1 Fig. 1 a D1S199 b D3S3727 c D17S1872 d D22S430 A M My N Arrowhead  Table 1 LOH regions in the meningioma, as determined by SNP analysis Chromosome region Exact interval (Mb) 1pter-p34.3 0–38.90 1p33-p33 46.99–51.09 1p32.2-1p31.3 58.19–65.50 2pter-p12 0–79.28 3p26.1-cen 6.11–88.84 7q36.1-qter 150.04–158.66 16pter-p12.1 0–22.75 16q23.1-q23.3 73.46–81.33 17cen-q21.31 23.09–40.35 19pter-p13.2 0–8.83 Discussion INI1 2 INI1 8 INI1 INI1 2 5 6 11 1 INI1 2 INI1 1 7 9 1 NF2 2 1 10 12 1