ERBB2 and serous cystadenocarcinoma: Fifty-two invasive epithelial ovarian tumours including 27 serous cystadenocarcinoma, 4 mucineus cystadenocarcinoma and 21 endometroid carcinoma were characterized for the presence of mutations in the entire tyrosine kinase domain of both the EGFR and HER2-neu receptors using DGGE and sequence analysis.