PMC5754307_01
Summary of case 1 according to radiological and pathological examinations and relationship between EGFR mutations in the (a) right middle and (b) left upper lobe tumors.
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Chest computed tomography (CT) revealed right middle lobe (RML) and left upper lobe (LUL) masses without enlarged bilateral mediastinal lymph nodes (Fig 1). The RML and LUL tumors exhibited similar morphological features of adenocarcinomas (Fig 1).
PMC5754307_02
Summary of case 2 according to radiological and pathological examinations and relationship between EGFR mutations in the (a) right upper and (b) left upper lobe tumors.
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Definitive pathological diagnosis revealed that the RUL tumor was invasive adenocarcinoma, papillary adenocarcinoma with no pleural invasion or lymphovascular permeation, and the LUL tumor was a minimally invasive adenocarcinoma (Fig 2).