<s>[INST] I have had a lesion on the anterior side of my knee for more than seven years.  Recently it swelled up to the size of an orange and when the swelling subsided I had two firm multifaceted lesions.  I had an ultrasound today, which showed that the lesions were hypoechoic.  Is there still a possibility that these lesions could be malignant? [/INST] HIT hank for asking to Chat Doctor I think the important is clinical sing and symptoms you have not said anything about your clinical problems most of the words you used here are being used by radiologist which most of the time does not create an exact sense and so the radiologist most of the time advise it for correlation with clinical condition, to rule out the possibility of malignancy, there has to be several tests to be taken in hand for final diagnosis of malignancy, one can not say anything about it like that only, if you are suspicious for malignancy then MRI is the initial test to be done first then numbers of other test are there but that can only be considered when MRI is indicative of some malignancy have nice day. </s>