Fig 4. Part-solid adenocarcinomas with or without recurrence.

(A) Mediastinal setting and (B) lung setting of CT images show a 3.2-cm part-solid adenocarcinoma in the right lower lobe (T2aN0M0, stage Ib). The lesion shows -315.27 HU (Hounsfield unit) and the area of lesion was 443.95 mm². (C) The region of interest (ROI) for the tumor drawn in the ImageJ was noted. Lung metastasis was developed two years after the surgery. (D, E) A 2.1-cm part-solid nodule in the left lower lobe. The tumor area was 247.65 mm² and the attenuation was -445.93 HU. (F) Air-bronchogram within the lesion was excluded for the measured ROI of the lesion. There was no recurrence in this patient for recent three years.