Potassium metal was first isolated in 1807 in England by Sir Humphry Davy, who derived it from caustic potash (KOH, potassium hydroxide) by the use of electrolysis of the molten KOH with the newly discovered voltaic pile.
Definition of Angiomyolipoma of the Kidney. Angiomyolipoma of the kidney is a rare benign renal tumor with a high fat content. Epidemiology of Renal Angiomyolipoma. Prevalence: The prevalence in autopsies is 0.3%, with ultrasound screening 0.1%. Women are much more frequently affected than men.
Angiomyolipomas are less commonly found in the liver and rarely in other organs. Whether associated with these diseases or sporadic, angiomyolipomas are caused by mutations in either the TSC1 or TSC2 genes, which govern cell growth and proliferation. They are composed of blood vessels, smooth muscle cells and fat cells.