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This review looks at the present literature available regarding cell response to nano-islands produced by nanotopography. Polymer demixing is a chemical method of fabricating large areas of nanotopography quickly and cheaply, making it ideal for cell testing and thus allowing it to be one of the first well-researched methods in cell engineering. The review shows that cells respond strongly to the islands (cell types observed include endothelial cells, fibroblasts, osteoblasts, leucocytes and platelets). Such changes include differences in adhesion, growth, gene expression and morphology.