Tumour model (IMAGE) University of Göttingen Caption Tumour model using clumps of cancer cells (their nuclei are marked red) in a soft 3-D matrix of collagen showing how the pressure causes the cancer cells to burst rapidly into pockets in the surrounding soft matrix. Credit Dr Swetha Raghuraman Usage Restrictions None License Original 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.