@foxnews: Teen boys are reportedly turning to a cancer drug to grow taller, and doctors warn the trend could cause permanent damage. The trend, called “heightmaxxing,” involves teens seeking black-market versions of erdafitinib after reports that the drug caused major growth spurts in young cancer patients. But doctors warn it can lead to serious bone problems and potentially irreversible vision damage. See why one teenager’s growth during cancer treatment is raising concerns at the link.