[en] Today ultrasound investigation is one of the most effective approaches to differential diagnostics of malignant tumors in ovaries and the way to determine the size of their spreading as well. Good qualification of the specialist who carries out ultrasound investigation is of great importance. The traits which are characteristic to the malignant tumors are: heterogeneous mixed structure of the tumor, indistinct contours, presence of partitions and infiltrations, papillary invasions outside and inside of its surface, availability of spare liquor in abdominal cavity