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. 2020 Jan 24;11(3):217–222.

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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ultrasonographic patterns of RPOC. Gutenberg Classification. A- Type 0: hyperechogenic avascular mass. B-Type 1: Different echoes with minimal or no vascularization. C- Type 2: Highly vascularized mass confined to the cavity. D- Type 3: Highly vascularized mass with highly vascularized endometrium.