“…These include (1) diffuse renal enlargement, (2) renal mass, (3) multiple parenchymal nodes, (4) renal sinus masses, (5) peripelvic or periureteral infiltration mimiking hydronephrosis, (6) renal invasion by a retroperitoneal mass, or (7) renal encasement by retroperitoneal lymphoma. [2][3][4][5][6][7][8][9][10][11] The hypoechoic halo that may be found surrounding the kidneys, independently of retroperitoneal lymphadenopathy or masses, is less well recognized.…”