Figure 1: a) Cluster of suspicious cells, mesothelial cells and lymphocytes. (toluidine 100X), b) Cluster of malignant cells, mesothelial cells and lymphocytes. (Leishman 100X), C) Cluster of suspicious cells, showing cytoplasmic positivity (IHC CK: 200X), d) Cluster of suspicious cells, showing cytoplasmic and membranous cytoplasmic positivity (IHC EMA: 200X), e) Scattered mesothelial cells, showing cytoplasmic positivity. (IHC Calretinin: 200X), f) Morphometric analysis of singly CK positive cells. (IHC: 200X), finally diagnosed as lung carcinoma.