Anna Franz, a biochemist

Anna Franz, a biochemist at the University of Bristol in Britain, was studying how a fruit fly’s immune cells respond when the insect is wounded. Under the microscope, she noticed cloudlike shadows moving toward a lesion. Because of their size, she suspected the shadows might be fat cells, which can be five to 10 times bigger than other cells found in fruit flies.

But how could these cells — which are conventionally believed to have no ability to move themselves around — make such an unlikely journey? And why?
https://www.nytimes.com/2018/02/26/science/fat-cells-wounds-flies.html