Clusters of cancer cells get around by moving single file
To squeeze through capillaries, tumor cells unfurl and pass through one by one
![magnified image of cells squeezing through a capillary](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/04/041816_ss_cells-clusters.jpg?fit=860%2C460&ssl=1)
SQUEEZE PLAY As a clump of stained human breast cancer cells approaches a capillary tube, the cells adjust their formation and their shape to pass through the narrow space.
S.H. Auet al/PNAS 2016