Medical Terminology Breakdown: Nephrolithiasis
Nephrolithiasis is constructed from three Greek word roots: "nephro-" (kidney) + "litho-" (stone) + "-iasis" (condition or disease state), literally meaning "the condition of having stones in the kidney." 1
Word Component Analysis
Root Components:
Nephro- (Greek: nephros = kidney)
- Used in medical terms relating to the kidney
- Examples: nephrology, nephritis, nephrectomy
Litho- (Greek: lithos = stone)
- Refers to calculi or stone-like formations
- Examples: lithotripsy (stone crushing), lithogenesis (stone formation)
-iasis (Greek suffix = condition, disease process, or pathological state)
- Indicates an abnormal condition or disease
- Examples: psoriasis, candidiasis, cholelithiasis
Clinical Definition
Nephrolithiasis is a condition in which kidney stones, formed from crystals precipitating from the urine, develop within the urinary tract when the urinary concentration of crystal-forming substances is high or when substances that inhibit stone formation are low. 1
Stone Composition:
- Approximately 80% consist of calcium oxalate, calcium phosphate, or both
- Other types include struvite, uric acid, or cystine stones 1
Related Medical Terms
Alternative terminology:
- Urolithiasis: "uro-" (urine/urinary tract) + "litho-" + "-iasis" = stones anywhere in the urinary system
- Renal calculi: Latin-derived term meaning kidney stones
- Kidney stone disease: Plain English equivalent 2
Epidemiological Context
The term describes a common condition affecting approximately 10-12% of the global population, with lifetime prevalence of 13% for men and 7% for women, and a 5-year recurrence rate of 35-50% without treatment. 1, 3