Immunocytochemical analysis showed that approximately half of the tumor cells stained positive for cytokeratin 8 and 7 (CK8, CK7) with nuclear staining to Thyroid Transcription Factor 1 (TTF1) (Fig. 1c) and cytoplasmic inclusions in May-Grünwald-Giemsa (MGG) staining (Fig. 1d) that were consistent with metastasis from pulmonary adenocarcinoma. The gene discussed is KRT8; the disease is neoplasm.