Larynx - Squamous cell carcinoma showing strong CD31 staining of a subset of tumor cells. Intratumoral macrophages and blood vessels also stain CD31 positive.
Ovary - Serous high-grade carcinoma. Strong CD31 immunostaining of intratumoral macrophages and blood vessels.
Pancreas - Adenocarcinoma of the papilla Vaterii showing a moderate CD31 immunostaining of a subset of tumor cells. A strong CD31 staining also occurs in blood vessels and inflammatory cells.