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.
Angiomyolipomas are the most common benign tumour of the kidney. Although regarded as benign, angiomyolipomas may grow such that kidney function is impaired or the blood vessels may dilate and burst leading to bleeding.
Angiomas of the liver, also called hepatic hemangiomas or angiomas are liver tumors that develop from blood vessels in the liver. A liver angioma is a benign liver tumor formed by small cavities filled with blood. In many cases, the tumor multiplies, and it is mainly found in adults between 30 and 50 years. The size of the tumor is usually less than 4 cm.