Pleura surface mesothelioma cells expressed both calretinin (Figure 3Ab) and intelectin-1 (Figure 3Ac and Ba); in contrast, reactive mesothelial cells on a lung adenocarcinoma-invaded pleura expressed calretinin (Figure 3Bb) but not intelectin-1 (Figure 3Bc). The gene discussed is ITLN1; the disease is mesothelioma.