Figure 2a. Endometrial polyp in a 70-year-old woman. (a) Sagittal transvaginal US image demonstrates a thickened heterogeneous endometrial echo complex (calipers) with cystic spaces. (b) Sagittal hysterosonogram shows fluid outlining the intracavitary mass (calipers); this finding enabled a confident diagnosis of a polyp. Correlative hysteroscopy and histopathologic analysis revealed a benign polyp.