IMP3 and p53 overexpression in serous tubal intraepithelial carcinoma (STIC). STIC (top panel) was strongly positive for both p53 (mid panel) and IMP3 (low panel). Apparently, this case showed more intraepithelial cancer cells were positive for p53 than those of IMP3. However, some of the neoplastic cells were positive for both p53 and IMP3 (right side of the mid and low panels). Original magnifications: left panel, 40x; right panel, 200x.