In summary, the current views of ALDH1 predictive role in ovarian carcinomas remain controversial, and the present long-term follow-up retrospective study reveals that high ALDH1 expression in tumor cells portends favorable prognosis and better survivals in patients with ovarian carcinoma, but the expression of ALDH1 in stromal cells has no associations with clinical outcomes. The gene discussed is ALDH1A1; the disease is ovarian carcinoma.