Fanconi syndrome is a rare kidney disorder that affects the renal tubules, leading to improper reabsorption of essential substances. This results in the loss of important nutrients, such as glucose, amino acids, and phosphate, in the urine. The condition can be caused by genetic factors, certain medications, or exposure to toxins. Symptoms of Fanconi syndrome may include excessive thirst, frequent urination, and growth issues in children. Diagnosis typically involves urine tests to check for abnormal levels of substances. Treatment focuses on managing symptoms and replacing lost nutrients to support overall health.