THE CHOLECYSTOGRAPHIC HALO IN HYDATID CYSTS. (AN EARLY AND PATHOGNOMONIC RADIOLOGICAL SIGN OF NON-COMPLICATED CYSTS OF THE LIVER)
EL HALO COLECISTOGR'AFICO DE LOS QUISTES HIDAT'IDICOS. (UN SIGNO RADIOL'OGICO PRECOZ Y PATOGNOM'ONICO DE LOS QUISTES NO COMPLICADOS DEL H'IGADO)