TTF1 and non-small cell lung carcinoma: The cases with a clonal CNA result and different histology were 1) a biopsy with NSCLC-favor SqCC (immunohistochemistry positive for p63 and negative for TTF-1) versus a resection specimen with adenocarcinoma and 2) biopsies of two lung tumors in the same lobe, showing a NSCLC-NOS (TTF-1 and p63 negative) and NSCLC-favor SqCC (TTF-1 negative, p63 positive).