PMC4185143_01
Initial chest CT of the pulmonary nodule with lung (a) and mediastinal window (b). A 2.4x2.6 cm pure ground glass nodule (pGGN) was present in the left lower lobe of the lung.
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At that time, chest CT confirmed the presence of the pGGN and showed no other pulmonary lesions (Fig. 1).
The pathology slide from resection tissue reveals well-differentiated papillary adenocarcinoma at the low power field (a). High-powered field slide demonstrates the typical acinar pattern of glandular differentiation (b). The tumor is strongly and diffusely TTF-1 positive (c), as is characteristic of primary adenocarcinoma of the lung.
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On histologic examination, the surgical specimen revealed moderately differentiated papillary adenocarcinoma (Fig. 2).