“…Volume restriction or depletion during acute illness heightens the risk of urolithiasis by concentrating the urine and its stone-forming solutes. Within the past decade, renal calculi have been reported in 1.4—8.7% of children on the KD (Freeman et al, 1998; Hassan et al, 1999; Furth et al, 2000; Maydell et al, 2001; Nordli et al, 2001; Kossoff et al, 2002a,b; Vaisleib et al, 2004; Sampath et al, 2007) and hematuria in as many as 10% (Lyczkowski et al, 2005). In general, lower rates are reported when GU imaging is restricted to patients with pain or macroscopic hematuria, whereas higher rates of urolithiasis are detected when imaging is also performed in cases of occult hematuria or hypercalciuric hypocitraturia.…”