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Fig. 1A —Stage T1 adenocarcinoma in 54-year-old woman with left lower
paratracheal lymph node metastasis on histopathologic examination. Axial
thin-section (2.5-mm collimation) CT scan using lung window setting obtained
at level of distal left main bronchus shows 22-mm nodule (arrow) with
lobulated and spiculated margin in left upper lobe. Other mediastinal window
setting images did not show any evidence of lymph node enlargement in
mediastinum or hilum.
