However, Teschendorf et al. [24] did not find any association between increased HOTAIR expression and grade, the first two studies [17, 18] included ovarian carcinoma patients with serous or epithelial subtype, whereas the third study [24] included all subtypes (serous, mucinous, endometrioid, clear cell) as well as fallopian tube and non-classifiable tumors, which may explain this discrepancy. The gene discussed is HOTAIR; the disease is ovarian carcinoma.