sonogrraphy of thyroid gland. right lobe 4.4x1.6x1.7 centimeter left lobe4.8x1.5x1.9 cm.solid nodule upper pole of right lobe 6x5mm. well defined without associated calcification. complex nodule upper pole 5 x4 mmmainly solid. another one in mid pole 6x5mm.noassociated calcification.left lobe:multiple complex nodules. largest 7x6 milimetersin midpole. another in lower pole. no associated calcification. smaller cystic and complex nodules are also seen. shoud I be preoccupied?