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Aspects of the FISH examination in the evaluation of the CDKN2A gene (A–C) and the 1p/19q codeletion (D–F). (A) Normal status of the CDKN2A gene. (B) Deletion at the level of the CDKN2A gene. (C) Amplification at the level of the CDKN2A gene. (D) Normal status. (E) Deletion at the 1p36 locus. (F) Deletion at the 19p13 locus. Magnification ×1000.
