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Histological subtypes of lung adenocarcinoma. (A) Adenocarcinoma in situ (well differentiated); (B) minimally invasive adenocarcinoma (well differentiated); (C) acinar-predominant (moderately differentiated); (D) papillary-predominant (moderately differentiated); (E) micropapillary-predominant (poorly differentiated); (F) solid-predominant (poorly differentiated).
