Complex sentence: An article in Nature Reviews Cancer in 2010 pointed out that five of the the'hallmarks' were also characteristic of benign tumours; the only hallmark of malignant disease was its ability to invade and metastasise (spread).
Split into simpler sentences: An article in Nature Reviews Cancer in 2010 pointed out that five of the the'hallmarks' were also characteristic of benign tumours. The only hallmark of malignant disease was its ability to invade and metastasise (spread).