Kidney stone: Hyperechoic mass does not really give enough information but this would most likely be consistent with a kidney stone. Calcification should also be considered and if the mass appears to be soft tissue then i would recommend ct follow-up to rule out malignancy.
Answered 2/20/2013
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Next - usually CT: A hyperechoic mass may be an angiomyolipoma, renal cell cancer, or hemorrhagic cyst among others. A ct would often be indicated to differentiate further. Angiomyolipoma is a benign growth (also known as hamartoma) but it can bleed. Renal cell cancers used to be thought to be hypoechoic (dark on ultrasound), but there have been cases of tumors enveloping fat and becoming hyperechoic (brighton us).
Answered 6/9/2015
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