Table 1

Reasons for noninformative tumor samples on the multitumor microarray

GenenInformative samplesSamples not informativea
ABCDEFTotal
CCND1 397297 (75%)152211131326100 (25%)
MYC 397336 (85%)152212111061 (15%)
ERBB2 397335 (84%)15221124862 (16%)
  • a A–C: tumor tissue not interpretable due to problems linked to the array technology. A, samples not present on the glass slide. B, no tumor tissue present in samples. C, samples floated off during sectioning or FISH procedure. D–F: tumor tissue not interpretable due to problems related to the FISH procedure. D, no signals in intact cells. E, cells destroyed. F, high background.