HOXA7 and ovarian carcinoma: Another HOX gene, HOXA7, was reported to be aberrantly expressed both at the RNA level (by quantitative PCR) and at the protein level (by immunohistochemistry using an anti-HOXA7 antibody) in ovarian cancer tissues which display Müllerian-like characteristics, however little or no expression was found in undifferentiated ovarian carcinomas and normal OSE [12].