Calcium oxalate nephrolithiasis (HP_0008672) is the presence of calcium- and oxalate-containing calculi (stones) in the kidneys. Also known as: Ca oxalate kidney stone, Ca oxalate nephrolithiasis, Ca oxalate urolithiasis, Ca2+ oxalate kidney stone, Ca2+ oxalate nephrolithiasis, Ca2+ oxalate urolithiasis, Calcium oxalate kidney stones, Oxalate nephrolithiasis.