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Representative spots included in micro tissue array (MTA) from prostate cancer samples. After histopathologic evaluation 4 groups of samples were distinguished within the MTA. (A) Benign prostatic hyperplasia (BPH); (B) low Gleason grade (LGG); (C) medium Gleason grade (MGG); and (D) high Gleason grade (HGG). Spot diameter, 1.5 mm.
