A new lung cancer pill from AstraZeneca (AZN.L), designed for patients whose disease has worsened after treatment with other therapies, won early U.S. approval on Friday, in a boost for the British drugmaker. Tagrisso, also known as AZD9291, is one of several cancer medicines AstraZeneca hopes will rebuild its sales following patent losses on older drugs. Industry analysts are more cautious about sales in the next few years, with consensus expectations pointing to revenue of $1.1 billion in 2020, according to Thomson Reuters Cortellis.