Fig. 1
Illustration of some stones analyzed a stone surgically extracted from the right ureter of 12 mm in diameter, irregular shape with Randall's plate, morphology IIb + Ia b stone of the right ureter of 5.5 mm in diameter, irregular shape, morphology Ia with Randall's plate c stone extracted from the bladder of 10 mm in diameter of irregular shape and hilly surface, bluish to dark brown (Ia + VIb). Heterogeneous section, periphery Ib + VIb and depth Ia. Non-individualized nucleus (Ia). d calculus spontaneously eliminated from the left ureter of a patient 6 mm in diameter, oval with a crystalline surface, spiculated light brown-yellow (IIa)