Abstract
Endometrioma generally shows higher intracystic signal intensity (SI) than mucinous cystadenoma (MCA) on T1 -weighted imaging (T1 WI). Nonendometrioma-associated malignant ovarian epithelial tumors (nonendometrioma group) often show higher intracystic SI than benign tumors on T1 WI, while the converse is true for endometrioma and endometrioma-associated malignant tumors (endometrioma group). However, it is sometimes difficult to differentiate between hemorrhagic and mucinous content based on SI on T1 WI. Hemoglobin (Hb) and protein are both speculated to shorten T1 . To examine MRI values and Hb and total protein (TP) concentrations in ovarian tumors. Prospective. In all, 182 samples from 167 cystic ovarian tumors. 1.5T, spin-echo T1 WI, fast spin-echo T2 WI. The in vivo intracystic/psoas major muscle SI ratios were determined as references for intracystic SI. T1 and T2 values, cystic content inversion times (TIs), and Hb and TP concentrations were determined to evaluate differences between 1) endometrioma and MCA; 2) benign, borderline, and malignant tumors in the nonendometrioma group; and 3) those in the endometrioma group. Wilcoxon's rank-sum test, Kruskal-Wallis test. In endometriomas (n = 43) and MCAs (n = 27), mean T1 an...Continue Reading
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