Cachexia, Teresa Zimmers told the audience at the Annual Meeting of the American Association for Cancer Research (AACR), is "woefully understudied for the outsized impact it has on cancer patients." The condition, which is currently defined as weight loss and muscle wasting, is the direct cause of death in an estimated 25% to 30% of cancer patients. But it is the main subject of only 0.1% of research papers and 0.2% of clinical trials.