Crystal-induced acute kidney injury is a medical condition that occurs when there is an accumulation of crystals in the kidney, causing a sudden and severe decline in renal function. There are several synonyms for this condition, including crystal nephropathy, crystal-related acute kidney injury, and nephrocalcinosis. Other related terms include acute interstitial nephritis, which refers to inflammation of the kidney's interstitial tissue caused by crystal deposition, and tubulointerstitial nephritis, which describes injury to the kidney's tubules and interstitium. While crystal-induced acute kidney injury is a rare condition, prompt diagnosis and treatment are essential to prevent irreversible kidney damage.