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Cyst's wall was focally lined by gastric foveolar epithelium with cardial glands ((a) H/E, 200x), while most of the cyst was lined by a pseudostratified epithelium with ciliated cells ((b) H/E, 200x). Pseudostratified columnar ciliated epithelium was negative for CK20 ((c) 200x), TTF-1 ((d) 200x), and MUC5AC ((e) 400x) while expressed CEA ((f) 200x) and MUC1 ((g) 400x).
