Immunohistochemical staining for survivin, bcl-2, p53, and Ki-67 in adenoid cystic carcinomas. (A) Most tumor cells showed diffuse nuclear and cytoplasmic staining for survivin (staining score, 3). (B) Bcl-2 was expressed diffusely in the cytoplasm of tumor cells. The tumor cells showed positive nuclear staining for p53 (C) and Ki-67 (D). Original magnifications ×400, A-D.