Figure 2.

Hyperechoic (bright) medulla from medullary nephrocalcinosis. Several kidney diseases may be associated with a hyperechoic medulla, including medullary nephrocalcinosis, sickle cell diseases, and gout. The midline longitudinal image of the right kidney (A) and left kidney (B) demonstrate hyperechoic (bright) medulla (yellow arrow) in a 35-year-old woman with medullary calcinosis. (C) Axial noncontrast computed tomographic image of the same patient demonstrates calcification in medullary pyramids of both kidneys (black arrow). LK, left kidney; LO, long axis; MID, midline.