Fig. 6From: Undifferentiated carcinoma of the ampulla of VaterImmunohistochemical staining of the resected specimen. The tumor is positive for CAM 5.2 (a) but negative for synaptophysin (b) and chromogranin A (c). CD56 is weakly positive (d). The labeling index of MIB-1 was >90% (e) (All photomicrographs, ×200)Back to article page