CT and MR Findings of Krukenberg Tumors: Comparison with Primary Ovarian Tumors

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PurposeThe purposes of this study were to evaluate the CT and MR findings of Krukenberg tumors and to compare them with those of primary ovarian tumors.MethodThis study included 20 patients with Krukenberg tumors and 65 patients with various primary ovarian tumors. CT/MR/both imaging studies were available in 15/1/4 patients with Krukenberg tumor and 31/10/24 patients with primary ovarian tumors, respectively. Imaging findings of the tumors were categorized into three subgroups: a solid mass with intratumoral cysts, a solid mass without intratumoral cysts, and a predominantly cystic mass.ResultsAmong 32 Krukenberg tumors (bilateral in 12 patients), 22 were solid masses with intratumoral cysts, in 14 of which the wall of the intratumoral cysts showed apparently strong contrast enhancement on CT and/or MRI. Six Krukenberg tumors were solid masses without intratumoral cysts, and four were predominantly cystic masses. Imaging findings of 88 primary ovarian tumors (bilateral in 23 patients) were 5 solid masses with intratumoral cysts, 27 solid masses without intratumoral cysts, and 56 predominantly cystic masses. None of the five primary ovarian tumors with solid mass with intratumoral cysts demonstrated apparently strong contrast enhancement of the cyst wall.ConclusionKrukenberg tumor should be suspected when one sees solid ovarian tumors containing well demarcated intratumoral cystic lesions, especially if the walls of those cysts demonstrate apparently strong contrast enhancement.

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