Stromal cells presenting weak-to-high nucleolin immunoreactivity (light gray to dark bars, respectively) in all the histopathological types studied were also identified in adjacent non-tumoral lung tissues of the same origin (alveolar cells in adenocarcinoma, AD; respiratory epithelium in squamous cell, SQ and pleomorphic, PM; and mixed in adenosquamous, ADSQ; reviewed in Giangreco et al. [33]). This evidence concerns the gene NUCLEOLIN and adenocarcinoma.