1. From the Body Imaging Section, Centro de Diagnóstico Rossi, Esmeralda 141, Buenos Aires C1035ABD, Argentina (D.M.H., M.M.V., M.L.M.); Oncosurgical HPB Unit, Sanatorio de los Arcos, Swiss Medical Group, HPB, Buenos Aires, Argentina (O.C.A., R.H.R., I.A.P.F.); and Department of Radiology, Mayo Clinic, Phoenix, Ariz (N.L.S.).