<prompt> Endometriomas on ultasound appear asSolid with diffuse internal low-level echoes.Solid with focal internal low-level echoes.Cystic with diffuse internal low-level echoes.Cystic with focal hyperechoic internal echoes.  <response>: Endometrioma classically is cystic with homogenous, low-level internal echoes, i.e ground-glass echogenicity. 