Table 1.

Baseline data for 11 children with cystinuria

Patient	Sex	Age (y)	Symptoms	Calculi at presentation
1	F	6	RC, F, H	Staghorn
2	M	1.5	None	None
3	M	1.2	I, RC, PS	Four stones in right kidney, bladder and urethra. Largest 0.9 × 0.4cm
4	F	11.8	RC, V	Two in right ureter, size unknown
5	M	1.2	MH	One stone (2 cm) in right lower pole
6	F	2	RC, H	Unknown
7	F	8	None	Left staghorn calculus; also multiple foci in both kidneys.
8	M	11	RC	Left: three stones, including 0.9 × 0.5 cm stone in proximal ureter.
9	M	3.9	H, PS	Right: three stones in pelvis, 0.7-1.1cm; three in distal ureter (0.4-0.6 cm).
10	M	7	RC, H	Left: “Large” stone in pelvis; three “small” stones in ureter.
11	M	12	None	None

Abbreviations: RC, renal colic; F, fever; H, hematuria; I, irritability; PS, passed stone; V, vomiting; MH, microscopic hematuria.