ALDH9A1 and ovarian serous adenocarcinoma: In this study, we observed increased levels of P49189, also known as aldehyde dehydrogenase family 9 member A1 (ALDH9A1) or 4-trimethylaminobutyraldehyde dehydrogenase, in residual tissue from patients with high-grade serous ovarian cancer (HGSOC) treated with neoadjuvant chemotherapy.