Comparison Biopsies (IMAGE) Imperial College London Caption A traditional vegetable dye-stained biopsy (L) compared to a Digistain biopsy from the same sample (R). Credit Imperial College London Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.