Rather, tumors arise from the complex interplay between any number of mutually exclusive abnormal changes in the genome, the combinations of which can be unique to each individual patient. (sciencedaily.com)
The above listed normal aging changes can easily become abnormal changes if they go too far. (vetbabble.com)
The results showed the former players experienced a reduction in fine motor control and abnormal changes in brain function when compared with healthy people of the same age who had never played contact sport. (concussionwise.com)