Willow McMurray was having a great time playing softball with her summer team, like any 10-year-old might, when she started complaining about pain in her hands and elbows. 

Breakthroughs in cancer research are always something to celebrate. This year marks the 20th anniversary of a particular breakthrough in lung cancer treatment — the discovery of the EGFR gene mutation — that revolutionized how oncologists personalized treatment to each lung cancer patient.