title: The yin-yang sign.
authors.affiliation: Department of Radiology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL, 32224, USA, Caserta.Melanie@mayo.edu.
authors.forename: Melanie P
authors.initials: MP
authors.lastname: Caserta
authors.forename: Raymond B
authors.initials: RB
authors.lastname: Dyer
mesh_terms: D017541:Aneurysm, False / Q000000981:diagnostic imaging*; D006801:Humans; D018615:Ultrasonography, Doppler, Color