“…The ultrasonographic diagnosis of such degenerative changes is of great importance in assessing the risk of malignancy in patients with autonomous adenomas with inhomogeneous uptake and whose operability is doubtful or who are not operable at all. If cystic changes are found a more conservative approach can be risked than if a solid cold nodule is revealed (7,12,20,25,29,31,33,37). For further evaluation a fineneedle biopsy may then be used (11,12,40).…”