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(A) Case 1 showing solid nests in the left upper corner and mucin-filled cysts and mucous cells on the right side (H&E, x75). (B) Case 2 showing many mucous cells in the solid nests (H&E, x150). (C) Case 3 showing a cribriform-like structure with mucous cells (H&E, x150). (D) Case 4 was a mucoepidermoid carcinoma-like adenosquamous carcinoma (H&E, x150) (the illustration in the lower right corner clearly shows keratinization).
