Ma FH, et al. - In this prospective study involving 278 patients with adnexal masses, researchers examined the ability of proton magnetic resonance spectroscopy (¹H-MRS) to differentiate borderline from malignant epithelial ovarian tumors (EOTs). Data reported that the sensitivity, specificity, and area under the curve were 84%, 82%, and 0.89 for the Cho/Cr ratio; 94%, 97%, and 0.99 for the NAA/Cr ratio; and 94%, 97%, and 0.99 for the NAA/Cho ratio, respectively. Overll, the authors concluded that the NAA/Cho ratio is a reliable biomarker to distinguish between borderline and malignant EOTs.