1. A medical image processing device for extracting and displaying lesion candidate regions from a medical image, characterized by comprising: a first extracting unit that makes a first evaluation of a curved surface form for a first medical image to extract first lesion candidate regions; a second extracting unit that makes a second evaluation of a curved surface form for each of the first lesion candidate regions extracted by the first extracting unit to extract second lesion candidate regions; and a display unit that superimposes and displays the second lesion candidate regions extracted by the second extracting unit on a second medical image.