Fanconi Syndrome is a rare renal disorder marked by impaired reabsorption in the proximal renal tubules. Some synonyms for Fanconi Syndrome include Cystinosis, Bartter Syndrome, and Proximal Tubular Acidosis. Bartter Syndrome is a genetic condition caused by an imbalance in electrolytes in the kidneys, leading to low potassium levels. Proximal Tubular Acidosis is a condition where the kidneys fail to reabsorb bicarbonate, leading to low levels of bicarbonate in the blood. Cystinosis is a genetic disease resulting in the accumulation of the amino acid cystine in the body's cells, including those in the kidneys. All of these conditions share similarities in their effects on the kidneys and may require similar treatment approaches.