1. A system for analyzing an at least three-dimensional medical image, comprising a surface detector ( 52 ) for identifying a portion of a surface ( 5 ) of an object represented by the image; a lesion detector ( 51 ) for identifying a lesion ( 4 ) comprised in the object and represented by the image; and means ( 53 ) for establishing an orientation of the lesion ( 4 ) with respect to the portion of the surface ( 5 ), based on an output of the lesion detector ( 51 ) and an output of the surface detector ( 52 ).