Minimally invasive adenocarcinoma of the lung (MIA) is defined as a small (≤3 cm), solitary tumour with predominant alveolar epithelial appearance (lepidic growth), as in situ adenocarcinoma of the lung, with a zone of focal invasion of the chorion, with a size inferior to 5 mm. For MIA—as with adenocarcinoma in situ—, the prognosis is near 100% survival.
^Van Schil, P. E.; Asamura, H; Rusch, V. W.; Mitsudomi, T; Tsuboi, M; Brambilla, E; Travis, W. D. (2012). "Surgical implications of the new IASLC/ATS/ERS adenocarcinoma classification". European Respiratory Journal. 39 (2): 478–86. doi:10.1183/09031936.00027511. PMID21828029.