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A Diagnostic slide is a thin slice of formalin-fixed paraffin embedded (FFPE) block of tissue that was used by a hospital to diagnose a patient. This block of tissue does not provide any RNA or DNA for the TCGA project and is used by the TCGA Expert Pathology Committee to generate additional information on TCGA patients.

  • Surgical pathology reports produced by hospital pathologists and sent to the BCR comes from looking at slides from the same tissue blocks, but are not the diagnostic slide images submitted to the DCC
  • The TCGA Expert Pathology Committee examines slides cut from the same tissue block as above. Scanning of these slides are often performed by a BCR, but sometimes this is done by the hospital and sent to the BCR
  • The tissue for producing a tissue slide should be geographically adjacent to the tissue for producing the corresponding diagnostic slide
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