Figure 1: Folate receptor alpha (FRα) immunohistochemistry in low-grade serous carcinoma.

Representative examples of FRα-negative tumors: samples from different patients taken from ovary (left) and colon metastasis (right), and FRα-high tumors: samples from different patients taken from ovary (left) and peritoneal metastasis (right). The percentage of FRα-positive tumor cells (2+/3+ intensity) is indicated for each sample.