Figure 4From: Ovarian mucinous cystic tumor of borderline malignancy with a mural nodule of anaplastic spindle cell carcinoma: a case report Immunohistochemical analysis. The arrow indicates the cystic borderline tumor cells, which are positive for both keratin AE1&3 and keratin CAM5.2. In contrast, the sarcomatoid spindle cells of the mural nodule are positive for keratin AE1&3, but negative for keratin CAM5.2 (x 100).Back to article page