In 2011, the IASLC/ATS/ERS classification recommended discontinuing the BAC classification altogether, as well as the category of "mixed subtype adenocarcinoma". This change was made because the term BAC was being broadly applied to small solitary noninvasive tumors, minimally invasive adenocarcinoma, mixed subtype invasive adenocarcinoma, and even widespread disease. In addition to creating the new AIS and minimally-invasive categories, the guidelines recommend new terminology to clearly denote predominantly-noninvasive adenocarcinoma with mild invasion ("lepidic predominant adenocarcinoma"), as well as "invasive mucinous adenocarcinoma" in place of "mucinous BAC".