CEACAM5 and carcinoma: CEA was expressed in the cytoplasm and/or membrane of carcinoma cells (Figure 3C and D), and its expression was variable: grade − in 14 (14.7%) cases, grade 1+ in 26 (27.4%) cases, grade 2+ in 40 (42.1%) cases, and grade 3+ in 15 (15.8%) cases (Table 1).