Oxalic lithiasis or oxalo lime is a type of stone that may be responsible for urolithiasis
. These stones are composed of calcium oxalate crystals. Currently, it is the main type of stone responsible for urolithiasis, particularly in industrialized countries, related to dietary modifications. They may be present in the bladder, but more often in the kidneys
or the ureter. The oxalo lime stones can cause very painful renal colic
attacks by isolation of a stone in the urinary tract
which creates tension. The stones can be eliminated naturally through the urine, or by ultrasound surgery. Their nature must be analyzed by a technique called infrared spectrophotometry.