PLXNB1 and cystadenocarcinoma: As summarized in Table 1, Plexin-B1 immunoreactivity was present in 3 (15.00%) normal and benign ovarian samples (Figure 1A, 1B), in 7 (35.00%) borderline tumors (Figure 1C) and in 44 (55.00%) cystadenocarcinomas.