Step 1 → Renal Kidney StonesPreview this topic sectionPreview the conditions. Plans unlock the full Step 1 details when you need them. Free Biochemistry Free Microbiology Plans Kidney Stones conditions Kidney Stones (Ammonium Magnesium Phosphate - Struvite) Kidney Stones (Calcium) Kidney Stones (Cystine) Kidney Stones (Uric Acid)