In ovarian epithelial adenocarcinomas, HER3 was detected in 53.4% of samples.[61] HER4 was detected in 89-95% of serous cystadenocarcinomas.[62] In granulosa cell tumors, HER4 expression was higher than HER2 or HER3. This evidence concerns the gene ERBB3 and serous cystadenocarcinoma.