Metastases of rectal cancer to the lung and liver with the atypical immunohistochemical profile. a-f The metastasis to the lung. a HE, (b) CK7, (c) CK20, (d) CDX2, (e) TTF-1, (f) napsin A. g-i The metastasis to the liver. g HE, (h) CK7, (i) TTF-1. Note that CK20 and CDX2 were also negative in the metastasis to the liver (not shown). All images x10 objective. Targeted sequencing may facilitate differential diagnostics of pulmonary tumors: a case series: Diagnostic Pathology. Not altered. CC.